feat: add sync-label workflow

.github/workflows/sync-labels.yml

@@ -0,0 +1,29 @@
+# yaml-language-server: $schema=https://json.schemastore.org/github-workflow.json
+
+name: Sync labels
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - next
+    paths:
+      - .github/labels.yml
+
+jobs:
+  labels:
+    name: Sync labels
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: read
+      issues: write
+
+    steps:
+      - name: ⤵️ Check out code from GitHub
+        uses: actions/checkout@v4
+
+      - name: 🚀 Run Label Syncer
+        uses: micnncim/action-label-syncer@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}