feat: automatic branch deletion

Author: brynblack

.github/workflows/clean.yml

@@ -0,0 +1,28 @@
+name: Clean
+
+on:
+  pull_request:
+    types:
+      - closed
+
+jobs:
+  check-deployment-stop:
+    name: "Check / Deployment Stop"
+    runs-on: ubuntu-latest
+    container:
+      image: ghcr.io/matrixai/github-runner
+    concurrency:
+      group: check-deployment-stop
+      cancel-in-progress: false
+    if: startsWith(github.head_ref, 'feature')
+    steps:
+      - uses: actions/checkout@v4
+      - name: Run deployment
+        env:
+          CLOUDFLARE_ACCOUNT_ID: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
+          CLOUDFLARE_API_TOKEN: ${{ secrets.CLOUDFLARE_API_TOKEN }}
+        run: |
+          echo 'Perform service deployment for feature'
+          nix develop .#ci --command bash -c $'
+          wrangler delete --name "polykey-docs-dev-$GITHUB_HEAD_REF" --force
+          '