chore: add release workflow

.github/workflows/release.yml

@@ -0,0 +1,28 @@
+name: Release
+
+on:
+  pull_request:
+    types: [closed]
+    branches: [main]
+
+permissions:
+  contents: write
+
+jobs:
+  release:
+    if: github.event.pull_request.merged == true && contains(github.event.pull_request.labels.*.name, 'release')
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
+        with:
+          fetch-depth: 0
+          token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Setup mise
+        uses: jdx/mise-action@13abe502c30c1559a5c37dff303831bab82c9402 # v2
+
+      - name: Release
+        run: ./scripts/postversion.sh
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}