ci: Add sem-pr-label workflow

.github/workflows/sem-pr-label.yml

@@ -0,0 +1,27 @@
+name: 'relabel by sem pr'
+on:
+  pull_request_target:
+    types:
+      - opened
+      - edited
+
+jobs:
+  relabel:
+    permissions:
+      contents: read
+      pull-requests: write
+    runs-on: ubuntu-latest
+    steps:
+      - name: info
+        id: info
+        uses: hankei6km/gha-sem-from-title@v0
+        with:
+          title: ${{ github.event.pull_request.title }}
+      - name: relabel-by-sem-pr-type
+        uses: hankei6km/gha-sem-pr-labeler@v0
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          repo: ${{ github.repository }}
+          pr_num: ${{ github.event.pull_request.number }}
+          type: ${{ steps.info.outputs.type }}
+          is_breaking_change: ${{ steps.info.outputs.is_breaking_change }}