Add GitHub Actions workflows for crates.io publishing and releases

.github/workflows/publish.yml

@@ -0,0 +1,19 @@
+name: Publish to crates.io
+
+on:
+  push:
+    tags: ["v*"] # Triggers when pushing tags starting with 'v'
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    # environment: release # Optional: for enhanced security
+    permissions:
+      id-token: write # Required for OIDC token exchange
+    steps:
+      - uses: actions/checkout@v7
+      - uses: rust-lang/crates-io-auth-action@v1.0.5
+        id: auth
+      - run: cargo publish
+        env:
+          CARGO_REGISTRY_TOKEN: ${{ steps.auth.outputs.token }}

.github/workflows/release.yml

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+name: GitHub Release
+
+on:
+  push:
+    tags:
+      - "v*"
+
+jobs:
+  build:
+    name: ${{ matrix.target }}
+    strategy:
+      matrix:
+        include:
+          - os: ubuntu-latest
+            target: x86_64-unknown-linux-gnu
+            binary: matrixfall
+          - os: windows-latest
+            target: x86_64-pc-windows-msvc
+            binary: matrixfall.exe
+          - os: macos-latest
+            target: x86_64-apple-darwin
+            binary: matrixfall
+
+    runs-on: ${{ matrix.os }}
+    permissions:
+      id-token: write
+      attestations: write
+
+    steps:
+      - uses: actions/checkout@v7
+
+      - name: Build
+        run: cargo build --release
+
+      - name: Generate provenance
+        uses: actions/attest-build-provenance@v4
+        with:
+          subject-path: target/release/${{ matrix.binary }}
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v7.0.1
+        with:
+          name: ${{ matrix.target }}
+          path: target/release/${{ matrix.binary }}
+
+  release:
+    needs: build
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+
+    steps:
+      - name: Download all artifacts
+        uses: actions/download-artifact@v8.0.1
+        with:
+          path: artifacts
+
+      - name: Create Release
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: |
+          gh release create "${{ github.ref_name }}" \
+            artifacts/x86_64-unknown-linux-gnu/matrixfall \
+            artifacts/x86_64-pc-windows-msvc/matrixfall.exe \
+            artifacts/x86_64-apple-darwin/matrixfall \
+            --generate-notes \
+            --title "${{ github.ref_name }}"