ci: add github action to check if helm docs is updated

.github/workflows/helm-docs.yaml

@@ -0,0 +1,49 @@
+name: Check Helm Docs
+
+on:
+  pull_request:
+    paths:
+      - 'charts/**'   # Only trigger on changes to charts
+
+jobs:
+  check-helm-docs:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Set up Go environment
+        uses: actions/setup-go@v4
+        with:
+          go-version: '1.22.5'  # Ensure you have a suitable Go version
+
+      - name: Install helm-docs
+        run: |
+          go install github.com/norwoodj/helm-docs/cmd/[email protected]
+
+      - name: Run helm-docs
+        run: |
+          helm-docs
+
+      - name: Check for uncommitted changes
+        run: |
+          git diff --exit-code --ignore-all-space
+        continue-on-error: true
+        id: git_diff
+
+      - name: Display differences if found
+        if: steps.git_diff.outcome == 'failure'
+        run: |
+          echo "The following changes were detected:"
+          git diff --ignore-all-space
+
+      - name: Fail if helm-docs changes were needed
+        if: steps.git_diff.outcome == 'failure'
+        run: |
+          echo "::error::helm-docs was not applied or is outdated"
+          exit 1
+
+      - name: Success message
+        if: steps.git_diff.outcome == 'success'
+        run: |
+          echo "helm-docs is up-to-date"