chore(license): add license checking configuration and workflow

.github/workflows/licensed.yml

@@ -0,0 +1,74 @@
+# This workflow checks the statuses of cached dependencies used in this action
+# with the help of the Licensed tool. If any licenses are invalid or missing,
+# this workflow will fail. See: https://github.com/licensee/licensed
+
+name: Licensed
+
+on:
+  # Uncomment the below lines to run this workflow on pull requests and pushes
+  # to the default branch. This is useful for checking licenses before merging
+  # changes into the default branch.
+  # pull_request:
+  #   branches:
+  #     - main
+  # push:
+  #   branches:
+  #     - main
+  workflow_dispatch:
+
+permissions:
+  contents: write
+
+jobs:
+  licensed:
+    name: Check Licenses
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        id: checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        id: setup-node
+        uses: actions/setup-node@v4
+        with:
+          node-version-file: .node-version
+          cache: npm
+
+      - name: Install Dependencies
+        id: npm-ci
+        run: npm ci
+
+      - name: Setup Ruby
+        id: setup-ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ruby
+
+      - uses: licensee/setup-licensed@v1.3.2
+        with:
+          version: 4.x
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+
+      # If this is a workflow_dispatch event, update the cached licenses.
+      - if: ${{ github.event_name == 'workflow_dispatch' }}
+        name: Update Licenses
+        id: update-licenses
+        run: licensed cache
+
+      # Then, commit the updated licenses to the repository.
+      - if: ${{ github.event_name == 'workflow_dispatch' }}
+        name: Commit Licenses
+        id: commit-licenses
+        run: |
+          git config --local user.email "licensed-ci@users.noreply.github.com"
+          git config --local user.name "licensed-ci"
+          git add .
+          git commit -m "Auto-update license files"
+          git push
+
+      # Last, check the status of the cached licenses.
+      - name: Check Licenses
+        id: check-licenses
+        run: licensed status

.licensed.yml

@@ -0,0 +1,18 @@
+# See: https://github.com/licensee/licensed/blob/main/docs/configuration.md
+
+sources:
+  npm: true
+
+allowed:
+  - apache-2.0
+  - bsd-2-clause
+  - bsd-3-clause
+  - isc
+  - mit
+  - cc0-1.0
+  - other
+
+ignored:
+  npm:
+    # Used by Rollup.js when building in GitHub Actions
+    - '@rollup/rollup-linux-x64-gnu'