ci: add label sync workflow

.github/workflows/label-sync.yml

@@ -0,0 +1,30 @@
+name: Sync labels
+on:
+  # Allows you to call this workflow from other workflows
+  workflow_call:
+    secrets:
+      NPM_TOKEN:
+        required: false
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+  # Schedule this to run every 24 hours
+  schedule:
+    - cron: '0 0 * * *'
+
+permissions:
+  contents: read
+
+jobs:
+  labels:
+    runs-on: [self-hosted, linux]
+
+    permissions:
+      issues: write
+
+    steps:
+      - uses: EndBug/label-sync@v2
+        with:
+          config-file: https://raw.githubusercontent.com/eviden-parallel/.github/main/.github/labels.yml
+          delete-other-labels: true