ci: add github workflow job for releasing

.github/workflows/release-please.yml

@@ -0,0 +1,18 @@
+name: release-please
+
+on:
+  push:
+    branches:
+      - master
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  release-please:
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: google-github-actions/release-please-action@v3
+        with:
+          release-type: simple
+          package-name: dropbar.nvim