chore: add release flow

.github/workflows/ci.yml

@@ -58,6 +58,8 @@ jobs:
         with:
           name: dist
           path: dist
+          if-no-files-found: error
+          retention-days: 7
 
   codeql:
     name: analyze (${{ matrix.language }})

.github/workflows/release.yml

@@ -0,0 +1,86 @@
+name: release
+
+permissions: {}
+
+on:
+  push:
+    tags:
+      - "v*"
+  workflow_dispatch:
+    inputs:
+      tag:
+        description: "Tag to release (e.g. v1.3.0)"
+        required: true
+        type: string
+      prerelease:
+        description: "Mark as prerelease"
+        type: boolean
+        default: false
+        required: true
+      draft:
+        description: "Create as draft"
+        type: boolean
+        default: false
+        required: true
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - uses: actions/checkout@v5
+        with:
+          fetch-depth: 0
+          persist-credentials: true
+
+      - if: github.event_name == 'workflow_dispatch'
+        run: |
+          tag="${{ inputs.tag }}"
+          if git rev-parse -q --verify "refs/tags/$tag" >/dev/null; then
+            echo "Tag $tag exists"
+          else
+            git config user.name "github-actions[bot]"
+            git config user.email "github-actions[bot]@users.noreply.github.com"
+            git tag -a "$tag" -m "Release $tag"
+            git push origin "$tag"
+          fi
+
+      - uses: pnpm/action-setup@v4
+        with:
+          version: latest
+          run_install: false
+
+      - uses: actions/setup-node@v6
+        with:
+          node-version-file: ".nvmrc"
+          cache: "pnpm"
+
+      - run: pnpm install --frozen-lockfile
+      - run: pnpm run fmt:check
+      - run: pnpm run lint:check
+      - run: pnpm run build
+
+      - run: |
+          tar -czf dist.tar.gz -C dist .
+          sha256sum dist.tar.gz | tee dist.tar.gz.sha256
+
+      - id: meta
+        run: |
+          if [ "${{ github.event_name }}" = "push" ]; then
+            echo "tag=${GITHUB_REF_NAME}" >> "$GITHUB_OUTPUT"
+          else
+            echo "tag=${{ inputs.tag }}" >> "$GITHUB_OUTPUT"
+          fi
+
+      - uses: softprops/action-gh-release@v2
+        with:
+          tag_name: ${{ steps.meta.outputs.tag }}
+          name: ${{ steps.meta.outputs.tag }}
+          draft: ${{ github.event_name == 'workflow_dispatch' && inputs.draft || false }}
+          prerelease: ${{ github.event_name == 'workflow_dispatch' && inputs.prerelease || false }}
+          files: |
+            dist.tar.gz
+            dist.tar.gz.sha256
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}