feat(ci): add release-please automated versioning workflow

.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: googleapis/release-please-action@v4
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          config-file: release-please-config.json
+          manifest-file: .release-please-manifest.json

.release-please-manifest.json

@@ -0,0 +1,3 @@
+{
+  ".": "0.1.0"
+}

CHANGELOG.md

@@ -9,6 +9,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 - **fix(ci):** `docker-publish.yml` was triggered by `release: types: [published]` (GitHub Release event) instead of `push: tags: v*` — pushing a git tag never fired the workflow. Changed trigger to `push: tags: v*` and updated `enable` conditions from `github.event_name == 'release'` to `startsWith(github.ref, 'refs/tags/v')` so any `v*` tag push automatically builds and publishes `latest` + semver tags to Docker Hub without requiring a manual GitHub Release.
 
+### Added
+- **feat(ci):** Automated versioning via `release-please` — on every push to `main`, the `release-please` workflow opens or updates a Release PR with a generated CHANGELOG entry and `package.json` version bump. Merging the Release PR creates the `vX.Y.Z` tag which triggers `docker-publish.yml`. Version bumps follow Conventional Commits: `fix:` → patch, `feat:` → minor, `feat!:` / `BREAKING CHANGE:` → major.
+
 ---
 
 ## [0.1.0] - 2026-03-24

package.json

@@ -1,6 +1,6 @@
 {
   "name": "sencho",
-  "version": "1.0.0",
+  "version": "0.1.0",
   "description": "",
   "main": "index.js",
   "scripts": {

release-please-config.json

@@ -0,0 +1,22 @@
+{
+  "$schema": "https://raw.githubusercontent.com/googleapis/release-please/main/schemas/config.json",
+  "packages": {
+    ".": {
+      "release-type": "node",
+      "bump-minor-pre-major": true,
+      "changelog-path": "CHANGELOG.md",
+      "changelog-sections": [
+        { "type": "feat",     "section": "### Added" },
+        { "type": "fix",      "section": "### Fixed" },
+        { "type": "perf",     "section": "### Fixed" },
+        { "type": "revert",   "section": "### Fixed" },
+        { "type": "security", "section": "### Security" },
+        { "type": "docs",     "section": "### Documentation", "hidden": true },
+        { "type": "chore",    "section": "### Miscellaneous",  "hidden": true },
+        { "type": "ci",       "section": "### CI/CD",          "hidden": true },
+        { "type": "refactor", "section": "### Changed",        "hidden": true },
+        { "type": "test",     "section": "### Tests",          "hidden": true }
+      ]
+    }
+  }
+}