add auto pr labeller workflow

.github/workflows/pr-labels.yaml

@@ -0,0 +1,50 @@
+name: Manage labels based on PR body
+
+on:
+  pull_request:
+    types: [opened, edited, reopened, synchronize]
+
+jobs:
+  manage-labels:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Analyze PR Body and manage labels
+        run: |
+          body="${{ github.event.pull_request.body }}"
+          labels_to_add=()
+          labels_to_remove=()
+          declare -A label_checks=(
+            ["New feature"]="enhancement"
+            ["Bug fix|Hotfix|Security patch"]="bug"
+            ["Documentation update"]="documentation"
+            ["Refactoring"]="refactor"
+            ["UI/UX improvement"]="UI/UX"
+          )
+          for key in "${!label_checks[@]}"; do
+            if echo "$body" | grep -q "\- \[x\] $key"; then
+              labels_to_add+=("${label_checks[$key]}")
+            else
+              labels_to_remove+=("${label_checks[$key]}")
+            fi
+          done
+          echo "LABELS_TO_ADD=${labels_to_add[*]}" >> $GITHUB_ENV
+          echo "LABELS_TO_REMOVE=${labels_to_remove[*]}" >> $GITHUB_ENV
+      - name: Add labels if necessary
+        if: env.LABELS_TO_ADD != ''
+        run: |
+          for label in ${{ env.LABELS_TO_ADD }}; do
+            curl -s -X POST \
+              -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
+              -H "Accept: application/vnd.github.v3+json" \
+              -d "{\"labels\": [\"$label\"]}" \
+              https://api.github.com/repos/${{ github.repository }}/issues/${{ github.event.pull_request.number }}/labels
+          done
+      - name: Remove labels if necessary
+        if: env.LABELS_TO_REMOVE != ''
+        run: |
+          for label in ${{ env.LABELS_TO_REMOVE }}; do
+            curl -s -X DELETE \
+              -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
+              -H "Accept: application/vnd.github.v3+json" \
+              https://api.github.com/repos/${{ github.repository }}/issues/${{ github.event.pull_request.number }}/labels/$label
+          done