tools: add WPT updater

Author: Mert Can Altin

.github/workflows/update-wpt.yml

@@ -0,0 +1,45 @@
+name: Update WPT
+
+on:
+  workflow_dispatch:
+  schedule:
+    # Run once a week at 12:00 AM UTC on Sunday.
+    - cron: 0 0 * * *
+
+jobs:
+  update-wpt:
+    name: Update WPT
+    permissions:
+      contents: write
+      pull-requests: write
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332  # v4.1.7
+        with:
+          persist-credentials: false
+          sparse-checkout: |
+            !test/fixtures/wpt
+      - name: Clone WPT Repository
+        uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332  # v4.1.7
+        with:
+          repository: web-platform-tests/wpt
+          path: test/fixtures/wpt
+          sparse_checkout: common/ eventsource/ fetch/ interfaces/ mimesniff/ resources/ service-workers/ storage/ websockets/ xhr/ LICENSE.md
+          persist-credentials: false
+      - name: Move WPT Files
+        run: |
+            rm -rf test/fixtures/wpt/.git
+            echo "NEW_VERSION=$(git rev-parse --short HEAD)" >> $GITHUB_ENV
+      - name: Create Pull Request
+        uses: gr2m/create-or-update-pull-request-action@86ec1766034c8173518f61d2075cc2a173fb8c97  # v1.9.4
+        env:
+          GITHUB_TOKEN: ${{ secrets.GH_USER_TOKEN }}
+        with:
+          author: Node.js GitHub Bot <[email protected]>
+          body: This is an automated update of the WPT to ${{ env.NEW_VERSION }}.
+          branch: actions/update-wpt  # Custom branch *just* for this Action.
+          commit-message: 'test: update WPT to ${{ env.NEW_VERSION }}'
+          labels: test
+          title: 'test: update WPT to ${{ env.NEW_VERSION }}'
+          update-pull-request-title-and-body: true