chore: add gh actions

There is no build step, but keep it for later reference.

.github/workflows/publish.yml

@@ -0,0 +1,20 @@
+name: Publish to npm
+
+# https://stackoverflow.com/questions/69063452/github-actions-on-release-created-workflow-trigger-not-working
+on:
+  workflow_run:
+    workflows: ["Release on tag"]
+    types: [completed]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - uses: actions/setup-node@v3
+      with:
+        node-version: '20.x'
+        registry-url: 'https://registry.npmjs.org'
+    - run: npm publish --access public
+      env:
+        NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}

.github/workflows/release_on_tag.yml

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+name: 'Release on tag'
+on:
+  push:
+    tags:
+      - '*'
+
+jobs:
+  release:
+    permissions:
+      contents: write
+    if: startsWith(github.ref, 'refs/tags/')
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      # - uses: actions/setup-node@v3
+      #   with:
+      #     node-version: '20.x'
+      #     registry-url: 'https://registry.npmjs.org'
+      # - run: npm install && npm run build && npm pack
+
+      - name: Build Changelog
+        id: github_release
+        uses: mikepenz/release-changelog-builder-action@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.RELEASE_PAT }}
+
+      - name: Create Release
+        uses: ncipollo/release-action@v1
+        with:
+          body: ${{steps.github_release.outputs.changelog}}
+        env:
+          GITHUB_TOKEN: ${{ secrets.RELEASE_PAT }}

.github/workflows/require_pr_label.yml

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+name: Pull Request Labels
+on:
+  pull_request:
+    types: [opened, labeled, unlabeled, synchronize]
+jobs:
+  label:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: mheap/github-action-required-labels@v1
+        with:
+          mode: exactly
+          count: 1
+          labels: "fix, feature, doc, chore, test, ignore, other, dependencies"