add lint test

.gitea/workflows/lint-test.yaml

@@ -0,0 +1,40 @@
+name: lint-and-test-charts
+
+on:
+  pull_request:
+    types: [opened]
+
+jobs:
+  lint-test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Set up Helm
+        uses: azure/setup-helm@v4
+        with:
+          version: latest
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.13"
+          check-latest: true
+
+      - name: Set up Chart Testing
+        uses: helm/chart-testing-action@v2.7.0
+
+      - name: Run Chart Testing (list-changed)
+        id: list-changed
+        run: |
+          changed=$(ct list-changed --target-branch ${{ gitea.event.repository.default_branch }})
+          if [[ -n "$changed" ]]; then
+            echo "changed=true" >> $GITHUB_OUTPUT
+          fi
+
+      - name: Run Chart Testing (lint)
+        if: steps.list-changed.outputs.changed == 'true'
+        run: ct lint --validate-maintainers=false --target-branch ${{ gitea.event.repository.default_branch }}