Add release GitHub action (#4)

Author: peteski22

.github/workflows/release.yaml

@@ -0,0 +1,62 @@
+name: Release
+
+on:
+  release:
+    types: [published]
+  workflow_dispatch:
+    inputs:
+      tag:
+        description: "Tag to release (e.g. v0.0.3)"
+        required: true
+      dry-run:
+        description: "Dry run (skip crates.io publish)"
+        required: false
+        default: false
+        type: boolean
+
+jobs:
+  publish:
+    name: Build and publish to crates.io
+    runs-on: ubuntu-latest
+    environment: crates-io
+
+    permissions:
+      contents: read
+      id-token: write  # Required for OIDC trusted publishing.
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          fetch-depth: 0
+
+      - name: Checkout release tag
+        run: |
+          git fetch --tags
+          TAG="${{ github.event.release.tag_name || github.event.inputs.tag }}"
+          if [ -z "$TAG" ]; then
+            echo "Error: No tag provided in release event or workflow_dispatch input"
+            exit 1
+          fi
+          echo "Checking out tag $TAG"
+          git checkout "$TAG"
+
+      - name: Setup Rust toolchain
+        uses: dtolnay/rust-toolchain@stable
+
+      - name: Install protoc
+        run: sudo apt-get update && sudo apt-get install -y protobuf-compiler
+
+      - name: Build
+        run: cargo build --release
+
+      - name: Authenticate with crates.io
+        if: ${{ !inputs.dry-run }}
+        uses: rust-lang/crates-io-auth-action@v1
+        id: auth
+
+      - name: Publish to crates.io
+        if: ${{ !inputs.dry-run }}
+        run: cargo publish
+        env:
+          CARGO_REGISTRY_TOKEN: ${{ steps.auth.outputs.token }}