ci: add release-please

.github/workflows/release-please.yml

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+name: Release Please
+
+on:
+  workflow_dispatch:
+  push:
+    branches: [main]
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  release-please:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: googleapis/release-please-action@v4
+        id: release
+    outputs:
+      release_created: ${{ steps.release.outputs.release_created }}
+      tag_name: ${{ steps.release.outputs.tag_name }}

.release-please-manifest.json

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+{}

release-please-config.json

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+{
+  "$schema": "https://raw.githubusercontent.com/googleapis/release-please/main/schemas/config.json",
+  "packages": {
+    ".": {
+      "package-name": "",
+      "release-type": "simple"
+    }
+  },
+  "changelog-sections": [
+    { "type": "feat", "section": "Features" },
+    { "type": "fix", "section": "Bug Fixes" },
+    { "type": "perf", "section": "Performance Improvements" },
+    { "type": "revert", "section": "Reverts", "hidden": true },
+    { "type": "docs", "section": "Documentation", "hidden": true },
+    { "type": "style", "section": "Styles", "hidden": true },
+    { "type": "chore", "section": "Miscellaneous Chores", "hidden": true },
+    { "type": "refactor", "section": "Code Refactoring", "hidden": true },
+    { "type": "test", "section": "Tests", "hidden": true },
+    { "type": "build", "section": "Build System", "hidden": true },
+    { "type": "ci", "section": "Continuous Integration", "hidden": true }
+  ]
+}