Auto label PR - github action (#2257)

Maintenance PR

.github/workflows/label_translation-pr.yml

@@ -0,0 +1,38 @@
+name: Label translation PRs
+
+on:
+  pull_request_target:
+    types: [opened, synchronize, reopened]
+
+permissions:
+  contents: read
+  pull-requests: write
+
+jobs:
+  label-translation:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Fetch PR diff
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: |
+          gh api \
+            repos/${{ github.repository }}/pulls/${{ github.event.pull_request.number }} \
+            --header "Accept: application/vnd.github.v3.diff" > pr.diff
+
+      - name: Detect ai_playerbot_texts inserts
+        id: detect
+        run: |
+          if grep -E '^\+.*INSERT[[:space:]]+INTO[[:space:]]+`?ai_playerbot_texts`?' pr.diff; then
+            echo "has_translation=true" >> "$GITHUB_OUTPUT"
+          else
+            echo "has_translation=false" >> "$GITHUB_OUTPUT"
+          fi
+
+      - name: Add label
+        if: steps.detect.outputs.has_translation == 'true'
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: |
+          gh pr edit ${{ github.event.pull_request.number }} \
+            --add-label "Added translation"