chore: release v0.3.0-alpha.1 (#916)

With the rename of the crate from `hugr_quantinuum` to `hugr` (#914) we
broke `release-plz`' automatic changelog generation (since it cannot
find the crate anymore), and all links to crate-related urls.

This alpha release should fix those issues, in addition to letting us
claim the new crate name.

I added the partial changelog bits from #898, #893, and #840 since they
won't be included in the new package's PRs.

drive-by: Move CHANGELOG and README from the root to the `hugr` dir to
be more consistent with other packages in the workspace, and symlink
them instead.

CHANGELOG.md

@@ -0,0 +1 @@
+hugr/CHANGELOG.md

README.md

@@ -0,0 +1 @@
+hugr/README.md

hugr/CHANGELOG.md

@@ -0,0 +1,78 @@
+# Changelog
+
+## Unreleased (xxxx-xx-xx)
+
+This release includes multiple breaking changes to the API, including the rename of the crate from `quantinuum_hugr` to `hugr`.
+
+### New Contributors
+
+* @Cobord made their first contribution in [#889](https://github.com/CQCL/hugr/pull/889)
+* @qartik made their first contribution in [#843](https://github.com/CQCL/hugr/pull/843)
+
+### Bug Fixes
+
+- [**breaking**] Polymorphic calls ([#901](https://github.com/CQCL/hugr/pull/901))
+
+### Documentation
+
+- HUGR spec copyediting ([#843](https://github.com/CQCL/hugr/pull/843))
+- Add builder module docs + example ([#853](https://github.com/CQCL/hugr/pull/853))
+- Add note on serialized hugr node order ([#849](https://github.com/CQCL/hugr/pull/849))
+
+### Features
+
+- Arbitrary types in the yaml extension definition ([#839](https://github.com/CQCL/hugr/pull/839))
+- Make all core types serializable ([#850](https://github.com/CQCL/hugr/pull/850))
+- Don't include empty type args in Display ([#857](https://github.com/CQCL/hugr/pull/857))
+- Mermaid renderer for hugrs ([#852](https://github.com/CQCL/hugr/pull/852))
+- Add impl TryFrom<&OpType> for ops::* ([#856](https://github.com/CQCL/hugr/pull/856))
+- [**breaking**] Infallible `HugrMut` methods ([#869](https://github.com/CQCL/hugr/pull/869))
+- Ancilla support in CircuitBuilder ([#867](https://github.com/CQCL/hugr/pull/867))
+- `CircuitBuilder::append_with_output_arr` ([#871](https://github.com/CQCL/hugr/pull/871))
+- [**breaking**] Make some `Container` methods infallible ([#872](https://github.com/CQCL/hugr/pull/872))
+- [**breaking**] Cleaner error on wiring errors while building ([#873](https://github.com/CQCL/hugr/pull/873))
+- [**breaking**] Change sums to be over TypeRows rather than Types ([#863](https://github.com/CQCL/hugr/pull/863))
+- Make various data publicly accessible ([#875](https://github.com/CQCL/hugr/pull/875))
+- [**breaking**] CustomConst is not restricted to being CustomType ([#878](https://github.com/CQCL/hugr/pull/878))
+- [**breaking**] Return the type of FuncDecl in `HugrView::get_function_type` ([#880](https://github.com/CQCL/hugr/pull/880))
+- [**breaking**] Merge `Value` into `Const` ([#881](https://github.com/CQCL/hugr/pull/881))
+- Replace `Tuple` with unary sums ([#891](https://github.com/CQCL/hugr/pull/891))
+
+### Performance
+
+- Add some simple benchmarks ([#892](https://github.com/CQCL/hugr/pull/892))
+
+### Refactor
+
+- Add `From` conversion from ExtensionId to ExtensionSet ([#855](https://github.com/CQCL/hugr/pull/855))
+- Remove clone in `ExtensionSet::union` ([#859](https://github.com/CQCL/hugr/pull/859))
+- Extension Inference: make fewer things public, rm Meta::new ([#883](https://github.com/CQCL/hugr/pull/883))
+- [**breaking**] Return impl trait in Rewrite trait ([#889](https://github.com/CQCL/hugr/pull/889))
+
+## 0.2.0 (2024-02-20)
+
+### Documentation
+
+- Fix crates.io badge in README ([#809](https://github.com/CQCL/hugr/pull/809))
+- Use absolute links in the README ([#811](https://github.com/CQCL/hugr/pull/811))
+- Remove input->const order edges from spec diagrams ([#812](https://github.com/CQCL/hugr/pull/812))
+- Remove incorrect indentation in spec ([#813](https://github.com/CQCL/hugr/pull/813))
+- Tweaks to main example ([#825](https://github.com/CQCL/hugr/pull/825))
+- Add example to `CFGBuilder` ([#826](https://github.com/CQCL/hugr/pull/826))
+
+### Features
+
+- Add InlineDFG rewrite ([#828](https://github.com/CQCL/hugr/pull/828))
+- [**breaking**] Impls of CustomConst must be able to report their type ([#827](https://github.com/CQCL/hugr/pull/827))
+- Minimal implementation for YAML extensions ([#833](https://github.com/CQCL/hugr/pull/833))
+
+## 0.1.0 (2024-01-15)
+
+This is the initial release of the Hierarchical Unified Graph Representation.
+See the representation specification available at [hugr.md](https://github.com/CQCL/hugr/blob/main/specification/hugr.md).
+
+This release includes an up-to-date implementation of the spec, including the core definitions (control flow, data flow and module structures) as well as the Prelude extension with support for basic classical operations and types.
+
+HUGRs can be loaded and stored using the versioned serialization format, or they can be constructed programmatically using the builder utility.
+The modules `hugr::hugr::view` and `hugr::hugr::rewrite` provide an API for querying and mutating the HUGR.
+For more complex operations, some algorithms are provided in `hugr::algorithms`.

hugr/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "hugr"
-version = "0.2.0"
+version = "0.3.0-alpha.1"
 edition = { workspace = true }
 rust-version = { workspace = true }
 

hugr/README.md

@@ -0,0 +1,54 @@
+hugr
+===============
+
+[![build_status][]](https://github.com/CQCL/hugr/actions)
+[![crates][]](https://crates.io/crates/hugr)
+[![msrv][]](https://github.com/CQCL/hugr)
+[![codecov][]](https://codecov.io/gh/CQCL/hugr)
+
+The Hierarchical Unified Graph Representation (HUGR, pronounced _hugger_) is the
+common representation of quantum circuits and operations in the Quantinuum
+ecosystem.
+
+It provides a high-fidelity representation of operations, that facilitates
+compilation and encodes runnable programs.
+
+The HUGR specification is [here](https://github.com/CQCL/hugr/blob/main/specification/hugr.md).
+
+## Usage
+
+Add the dependency to your project:
+
+```bash
+cargo add hugr
+```
+
+Please read the [API documentation here][].
+
+## Experimental Features
+
+- `extension_inference`:
+  Experimental feature which allows automatic inference of extension usages and
+  requirements in a HUGR and validation that extensions are correctly specified.
+  Not enabled by default.
+
+## Recent Changes
+
+See [CHANGELOG][] for a list of changes. The minimum supported rust
+version will only change on major releases.
+
+## Development
+
+See [DEVELOPMENT.md](https://github.com/CQCL/hugr/blob/main/DEVELOPMENT.md) for instructions on setting up the development environment.
+
+## License
+
+This project is licensed under Apache License, Version 2.0 ([LICENSE][] or http://www.apache.org/licenses/LICENSE-2.0).
+
+  [API documentation here]: https://docs.rs/hugr/
+  [build_status]: https://github.com/CQCL/hugr/actions/workflows/ci-rs.yml/badge.svg?branch=main
+  [msrv]: https://img.shields.io/badge/rust-1.75.0%2B-blue.svg
+  [crates]: https://img.shields.io/crates/v/hugr
+  [codecov]: https://img.shields.io/codecov/c/gh/CQCL/hugr?logo=codecov
+  [LICENSE]: https://github.com/CQCL/hugr/blob/main/LICENCE
+  [CHANGELOG]: https://github.com/CQCL/hugr/blob/main/CHANGELOG.md

release-plz.toml

@@ -1,11 +1,19 @@
 [workspace]
-changelog_config = "cliff.toml" # use a custom git-cliff configuration
-# disable the changelog for all packages
+# Open the release PR as a draft
+pr_draft = true
+
+# Use a custom git-cliff configuration
+changelog_config = "cliff.toml"
+
+# Disable the changelog generation by default
 changelog_update = false
 
+# Enforce adding the project name in the git tag, to avoid collisions with python.
+# (This would normally only be enabled once there are multiple packages in the workspace)
+git_tag_name = "{{ package }}-v{{ version }}"
+
 [[package]]
 name = "hugr"
-# enable the changelog for this package
+
+# Enable the changelog for this package
 changelog_update = true
-# set the path of the changelog to the root of the repository
-changelog_path = "./CHANGELOG.md"