feat: set up release-plz integration for publishing to crates.io (#297)

Author: alexhancock

.github/workflows/release-plz.yml

@@ -0,0 +1,60 @@
+name: Release-plz
+
+permissions:
+  pull-requests: write
+  contents: write
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+
+  # Release unpublished packages.
+  release-plz-release:
+    name: Release-plz release
+    runs-on: ubuntu-latest
+    if: ${{ github.repository_owner == 'modelcontextprotocol' }}
+    permissions:
+      contents: write
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: Install Rust toolchain
+        uses: dtolnay/rust-toolchain@stable
+      - name: Run release-plz
+        uses: release-plz/[email protected]
+        with:
+          command: release
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }}
+
+  # Create a PR with the new versions and changelog, preparing the next release.
+  release-plz-pr:
+    name: Release-plz PR
+    runs-on: ubuntu-latest
+    if: ${{ github.repository_owner == 'modelcontextprotocol' }}
+    permissions:
+      contents: write
+      pull-requests: write
+    concurrency:
+      group: release-plz-${{ github.ref }}
+      cancel-in-progress: false
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: Install Rust toolchain
+        uses: dtolnay/rust-toolchain@stable
+      - name: Run release-plz
+        uses: release-plz/[email protected]
+        with:
+          command: release-pr
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }}