Adds GitHub actions

.github/workflows/ci.yml

@@ -0,0 +1,48 @@
+name: Continuous Integration
+
+# run for pull requests and pushes to master branch
+on:
+  push:
+    branches:
+      - 'master'
+  pull_request:
+
+# always use pretty colors
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  # check formatting (use nightly rustfmt)
+  formatting:
+    name: Check Formatting
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - run: rustup update nightly
+      - run: rustup component add rustfmt --toolchain nightly
+      - run: cargo default nightly
+      - run: cargo fmt --check
+
+  # check style (using clippy)
+  style:
+    name: Check Style
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@4
+      - run: cargo clippy --check
+
+  # build and test code
+  build_and_test:
+    name: Rust project - latest
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        toolchain:
+          - stable
+          - beta
+          - nightly
+    steps:
+      - uses: actions/checkout@v4
+      - run: rustup update ${{ matrix.toolchain }} && rustup default ${{ matrix.toolchain }}
+      - run: cargo build --verbose
+      - run: cargo test --verbose