add the labeler github action

.github/labeler.yml

@@ -0,0 +1,17 @@
+component/config:
+  - config/*
+
+component/br:
+  - src/main/java/org/tikv/br/*
+
+component/cdc:
+  - src/main/java/org/tikv/cdc/*
+
+component/common:
+  - src/main/java/org/tikv/common/*
+
+component/rawkv:
+  - src/main/java/org/tikv/raw/*
+
+component/txnkv:
+  - src/main/java/org/tikv/txn/*

.github/pr-branch-labeler.yml

@@ -0,0 +1,5 @@
+type/3.1-cherry-pick:
+  base: "release-3.1"
+
+type/3.0-cherry-pick:
+  base: "release-3.0"

.github/workflows/labeler.yml

@@ -0,0 +1,11 @@
+name: "Pull Request Labeler"
+on:
+- pull_request_target
+
+jobs:
+  triage:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/labeler@v3
+      with:
+        repo-token: "${{ secrets.GITHUB_TOKEN }}"

.github/workflows/pr-branch-labeler.yml

@@ -0,0 +1,13 @@
+name: PR Branch Labeler
+
+on: pull_request
+
+jobs:
+  label_prs:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Label PRs
+      if: github.event.action == 'opened' # Only run the action when the PR was first opened
+      uses: ffittschen/pr-branch-labeler@v1
+      with:
+        repo-token: ${{ secrets.GITHUB_TOKEN }}