ci: 添加自动化工具提升项目质量

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

@@ -0,0 +1,31 @@
+name: PR Size Labeler
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened]
+
+permissions:
+  contents: read
+  pull-requests: write
+
+jobs:
+  size-label:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Label PR by size
+        uses: codelytv/pr-size-labeler@v1
+        with:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          xs_label: 'size/XS'
+          xs_max_size: '10'
+          s_label: 'size/S'
+          s_max_size: '100'
+          m_label: 'size/M'
+          m_max_size: '500'
+          l_label: 'size/L'
+          l_max_size: '1000'
+          xl_label: 'size/XL'
+          message_if_xl: |
+            这个 PR 改动较大（超过 1000 行），建议拆分成多个小 PR 以便 Review。
+
+            This PR is quite large (over 1000 lines). Consider splitting it into smaller PRs for easier review.