ci(release): setup release-please

Setup release-please to handle version bumping, changelog generation,
and creating releases on GitHub.

.github/workflows/release-please.yml

@@ -0,0 +1,16 @@
+---
+on: push
+
+jobs:
+  release-please:
+    runs-on: ubuntu-latest
+    if: github.ref == 'refs/heads/main'
+    outputs:
+      release_created: ${{ steps.release-please.outputs.release_created }}
+      tag_name: ${{ steps.release-please.outputs.tag_name }} # e.g. v1.0.0
+      version: ${{ steps.release-please.outputs.version }} # e.g. 1.0.0
+    steps:
+      - uses: google-github-actions/release-please-action@v3
+        id: release-please
+        with:
+          command: manifest