Automatically add PR labels (#1835)

* chore: add PR labeler

* chore: update labeler config

* chore: add action label

* refactor: use terse syntax

.github/labeler.yml

@@ -0,0 +1,21 @@
+# See https://github.com/actions/labeler
+
+example:
+- examples/**/*
+
+action:
+- .github/workflows/**
+
+docs:
+- docs/**
+
+www:
+- www/**
+
+i18n:
+- any:
+  - 'docs/src/pages/*/**'
+  - '!docs/src/pages/core-concepts/**'
+  - '!docs/src/pages/guides/**'
+  - '!docs/src/pages/migration/**'
+  - '!docs/src/pages/reference/**'

.github/workflows/label.yml

@@ -0,0 +1,12 @@
+name: Label PRs
+
+on:
+  - pull_request_target
+
+jobs:
+  triage:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/labeler@v3
+      with:
+        repo-token: "${{ secrets.GITHUB_TOKEN }}"