feat: add helm chart github action (#2113)

* feat: add helm chart github action

Signed-off-by: Ludovic Ortega <ludovic.ortega@adminafk.fr>

* fix: remove test branch

Signed-off-by: Ludovic Ortega <ludovic.ortega@adminafk.fr>

* fix: run helm-docs-built after syncing version

Signed-off-by: Ludovic Ortega <ludovic.ortega@adminafk.fr>

* fix: helm repo url

---------

Signed-off-by: Ludovic Ortega <ludovic.ortega@adminafk.fr>

.github/workflows/lint-helm-charts.yml

@@ -0,0 +1,47 @@
+name: Lint and Test Helm Charts
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+    branches: ["main"]
+
+jobs:
+  lint-test:
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: read
+
+    steps:
+        - uses: actions/checkout@v4
+          with:
+            fetch-depth: 0
+
+        - name: Set up Helm
+          uses: azure/setup-helm@v4
+
+        - name: Set up python
+          uses: actions/setup-python@v5
+          with:
+            python-version: '3.10'
+
+        - name: Run pre-commit
+          uses: pre-commit/action@v3.0.1
+          with:
+            extra_args: helm-docs-built
+
+        - name: Set up chart-testing
+          uses: helm/chart-testing-action@v2
+
+        - name: Run chart-testing (list-changed)
+          id: list-changed
+          run: |
+            changed=$(ct list-changed --target-branch ${{ github.event.repository.default_branch }})
+            if [[ -n "$changed" ]]; then
+              echo "changed=true" >> "$GITHUB_OUTPUT"
+            fi
+
+        - name: Run chart-testing
+          if: steps.list-changed.outputs.changed == 'true'
+          run: ct lint --target-branch ${{ github.event.repository.default_branch }} --validate-maintainers=false