ci: add release-please for release management

Author: hesreallyhim

.github/workflows/release-please.yml

@@ -0,0 +1,21 @@
+name: Release Please
+
+on:
+  push:
+    branches:
+      - main
+  workflow_dispatch:
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  release-please:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Run Release Please
+        uses: googleapis/release-please-action@16a9c90856f42705d54a6fda1823352bdc62cf38
+        with:
+          config-file: release-please-config.json
+          manifest-file: .release-please-manifest.json

.release-please-manifest.json

@@ -0,0 +1,3 @@
+{
+  ".": "1.0.2"
+}

MAINTAINERS.md

@@ -0,0 +1,32 @@
+# Maintainers
+
+This file documents the release workflow for this repository.
+
+## Release automation (Release Please)
+
+- Workflow: `.github/workflows/release-please.yml`
+- Trigger: pushes to `main` (or manual run via `workflow_dispatch`)
+- Behavior: opens or updates a release PR and manages `CHANGELOG.md`
+- Merge: merging the release PR creates the Git tag and GitHub Release
+
+## Release checklist
+
+1. Ensure commit messages follow conventional commits:
+   - `fix:` for patch releases
+   - `feat:` for minor releases
+   - `feat!:` or `BREAKING CHANGE:` for major releases
+2. Verify `dist/` is up to date if any `src/` files changed since the last release:
+   - run `npm run bundle`
+   - if `dist/` changes, commit them to the release PR
+3. Confirm CI is green on the release PR
+4. Merge the release PR
+
+## After merge
+
+- Confirm the GitHub Release is published (not a draft)
+- Verify the Marketplace listing reflects the new release tag/version
+
+## Notes
+
+- `CHANGELOG.md` is generated by Release Please; avoid manual edits.
+- If no release PR is created, confirm there are new conventional commits since the last tag.

release-please-config.json

@@ -0,0 +1,10 @@
+{
+  "packages": {
+    ".": {
+      "release-type": "simple",
+      "package-name": "github-api-usage-tracker",
+      "changelog-path": "CHANGELOG.md",
+      "include-v-in-tag": true
+    }
+  }
+}