chore: Add labeler workflow for pull request sizes (#140)

.github/workflows/pull-request-labeler.yml

@@ -0,0 +1,30 @@
+---
+name: Pull Request Labeler
+
+on:
+  pull_request_target:
+
+jobs:
+  triage:
+    name: Label triage
+
+    permissions:
+      issues: write
+      pull-requests: write
+
+    runs-on: ubuntu-22.04
+
+    steps:
+      - uses: CodelyTV/[email protected]
+        with:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          xs_label: 'size/XS'
+          xs_max_size: '30'
+          s_label: 'size/S'
+          s_max_size: '60'
+          m_label: 'size/M'
+          m_max_size: '150'
+          l_label: 'size/L'
+          l_max_size: '300'
+          xl_label: 'size/XL'
+          message_if_xl: ''