PR Labeling workflow

.github/labeler.yml

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+docs:
+- changed-files:
+  - any-glob-to-any-file: '*.md'
+
+frontend:
+- changed-files:
+  - any-glob-to-any-file: 'frontend/**/*'
+  - any-glob-to-any-file: 'frontend/**/*.js'
+  - any-glob-to-any-file: 'frontend/**/*.ts'
+  - any-glob-to-any-file: 'frontend/**/*.tsx'
+  - any-glob-to-any-file: 'frontend/**/*.jsx'
+  - any-glob-to-any-file: 'frontend/**/*.css'
+  - any-glob-to-any-file: 'frontend/**/*.html'
+
+backend:
+  - changed-files:
+    - any-glob-to-any-file: 'backend/**/*'
+    - any-glob-to-any-file: 'backend/**/*.go'
+    - any-glob-to-any-file: 'backend/**/*.py'

.github/workflows/pr_labeler.yml

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+name: PR Labeler
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened]
+
+jobs:
+  file-labeler:
+    needs: size-label
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Add file-based labels
+        uses: actions/labeler@v5
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          configuration-path: .github/labeler.yml
+
+  size-label:
+    permissions:
+      contents: read
+      pull-requests: write
+    runs-on: ubuntu-latest
+    steps:
+      - name: size-label
+        uses: "pascalgn/[email protected]"
+        env:
+          GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
+        with:
+          sizes: >
+            {
+              "0": "XS",
+              "20": "S",
+              "50": "M",
+              "200": "L",
+              "800": "XL",
+              "2000": "XXL"
+            }