ci: add workflow to automatically label PRs based on title

.gitea/workflows/label-pr.yaml

@@ -0,0 +1,42 @@
+name: Auto Label PRs
+
+on:
+  pull_request:
+    types: [opened, edited]
+
+jobs:
+  label:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Apply labels based on PR title
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          PR_TITLE: ${{ github.event.pull_request.title }}
+          PR_NUMBER: ${{ github.event.pull_request.number }}
+          REPO_OWNER: ${{ github.repository_owner }}
+          REPO_NAME: ${{ github.event.repository.name }}
+          API_URL: ${{ github.api_url }}
+        run: |
+          shopt -s nocasematch
+          
+          labels="["
+          
+          if [[ "$PR_TITLE" =~ ^(ci|test)(/|:) ]]; then
+            labels="${labels}13," # 13 is Kind/Testing
+          fi
+          
+          if [[ "$PR_TITLE" =~ ^docs(/|:) ]]; then
+            labels="${labels}14," # 14 is Kind/Documentation
+          fi
+          
+          labels="${labels%,}]"
+          
+          if [ "$labels" != "[]" ]; then
+            echo "Adding labels to PR #${PR_NUMBER}: ${labels}"
+            curl -X POST "${API_URL}/repos/${REPO_OWNER}/${REPO_NAME}/issues/${PR_NUMBER}/labels" \
+              -H "Authorization: token ${GITHUB_TOKEN}" \
+              -H "Content-Type: application/json" \
+              -d "{\"labels\": ${labels}}"
+          else
+            echo "No matching prefixes found in title: ${PR_TITLE}"
+          fi