epic(nibiru-std): proto module with tests + scripts

[Unique-Divine]

• feat(justfile): Use just as the build tool
• refactor(packages): better match statement
• deps: Create nibiru-std package and add it to workspace with prost
• refactor(nibiru-std): migrate over packages/bindings as a submodule
• chore: Make scripts a crate so that we can use Rust scripts
• feat(proto_clean.rs): outline procedure and make script runnable
• feat(proto_clean.rs): add core business logic for cleaning imports
• feat(proto_clean.rs): clean file imports fns
• test(proto_clean): add fixtures for dirty and clean files
• test(proto_clean.rs): unit tests
• feat(proto_clean): complete main() for the script
• feat(nibiru-std): add proto types and lib.rs
• feat(nibiru-std): proto mod.rs, tests, and define modules with include statements

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• Part of feat(wasm): Create a Rust package to call module TxMsgs with CosmosMsg::StargateMsg nibiru#1580
• Part of feat: epic: Add convenient functions for building StargateMsg transactions and queries  #68