ci: let release-please maintain the changelog (#721)

.github/workflows/ci.yml

@@ -57,6 +57,19 @@ jobs:
       - run: flutter pub get
       - run: flutter pub publish --dry-run
 
+  release:
+    if: github.event_name != 'pull_request'
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      pull-requests: write
+    steps:
+      - uses: google-github-actions/release-please-action@v3
+        with:
+          release-type: dart
+          changelog-notes-type: github
+          pull-request-title-pattern: 'chore: release v${version}'
+
   test:
     runs-on: ubuntu-22.04
     steps:

.github/workflows/pr.yaml

@@ -0,0 +1,30 @@
+name: PR
+
+on:
+  pull_request_target:
+    types:
+      - opened
+      - edited
+      - synchronize
+
+permissions:
+  pull-requests: read
+
+jobs:
+  title:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: amannn/action-semantic-pull-request@v5
+        id: semantic-pr
+        env:
+          GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}
+      - uses: marocchino/sticky-pull-request-comment@v2
+        if: always() && steps.semantic-pr.outputs.error_message != null
+        with:
+          header: semantic-pr-error
+          message: ${{steps.semantic-pr.outputs.error_message}}
+      - if: steps.semantic-pr.outputs.error_message == null
+        uses: marocchino/sticky-pull-request-comment@v2
+        with:
+          header: semantic-pr-error
+          delete: true