A GitHub workflow to automagically label PRs with Explorer or web3.js changes (#28986)

.github/labeler.yml

@@ -0,0 +1,6 @@
+explorer:
+  - explorer/**/*
+
+web3.js:
+  - web3.js/**/*
+  - web3.js-experimental/**/*

.github/workflows/labeler.yml

@@ -0,0 +1,15 @@
+name: "Pull Request Labeler"
+on:
+  - pull_request_target # Danger; in `target` mode secrets are available to this workflow, even when the pull request comes from a community member.
+
+jobs:
+  triage:
+    permissions:
+      contents: read
+      pull-requests: write
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/labeler@v4
+        with:
+          repo-token: "${{ secrets.GITHUB_TOKEN }}"
+          sync-labels: true