ci: add pull requests labeler workflow

.github/labeler.yml

@@ -0,0 +1,32 @@
+ci:
+  - changed-files:
+      - any-glob-to-any-file:
+          - .github/workflows/*
+          - .github/labeler.yml
+
+dependencies:
+  - changed-files:
+      - any-glob-to-any-file:
+          - Cargo.toml
+          - Cargo.lock
+
+documentation:
+  - changed-files:
+      - any-glob-to-any-file:
+          - README.md
+          - RELEASE.md
+          - CHANGELOG.md
+          - CODE_OF_CONDUCT.md
+
+github_actions:
+  - changed-files:
+      - any-glob-to-any-file:
+          - .github/workflows/*
+          - .github/labeler.yml
+
+rust:
+  - changed-files:
+      - any-glob-to-any-file:
+          - src/*
+          - examples/*
+          - benches/*

.github/workflows/labeler.yml

@@ -0,0 +1,27 @@
+name: labeler
+
+on:
+  - pull_request_target
+
+permissions:
+  actions: read
+  checks: read
+  contents: read
+  deployments: read
+  issues: read
+  discussions: read
+  packages: read
+  pages: read
+  pull-requests: write
+  repository-projects: read
+  security-events: read
+  statuses: read
+
+jobs:
+  triage:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/labeler@8558fd74291d67161a8a78ce36a881fa63b766a9 # v5.0.0
+        with:
+          repo-token: "${{ secrets.GITHUB_TOKEN }}"
+          sync-labels: true