chore: adding release-please to github workflows.

Author: caio1985

.github/workflows/release-please.yml

@@ -0,0 +1,21 @@
+on:
+  push:
+    branches:
+      - main
+
+permissions:
+  contents: write
+  pull-requests: write
+
+name: release-please
+
+jobs:
+  release-please:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: google-github-actions/release-please-action@v4
+        with:
+          token: ${{ secrets.SYNCED_GITHUB_TOKEN_REPO }}
+          release-type: dart
+          package-name: "@googlemaps/flutter-navigation-sdk"
+          bump-minor-pre-major: true