chore: add release-please (#269)

For automating release notes and release PR's

.github/workflows/release-please.yml

@@ -0,0 +1,20 @@
+name: release-please
+
+on:
+  push:
+    branches:
+      - main
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  release-please:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: google-github-actions/release-please-action@v4
+        with:
+          # Version is determined by sbt-ci-release (which uses sbt-dynver)
+          # Actual release code is in `./scala.yml`
+          release-type: simple