Add action to package and publish chart

.github/workflows/main.yaml

@@ -0,0 +1,42 @@
+name: Publish Helm Chart
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Setup Helm
+        uses: azure/setup-helm@v3
+
+      - name: Package Helm Chart
+        working-directory: ${{ github.workspace }}
+        run: |
+          helm package charts/langkit
+
+      - name: Login to GHCR
+        run: |
+          echo "${{ secrets.GITHUB_TOKEN }}" | \
+            docker login ghcr.io \
+            -u ${{ github.repository_owner }} \
+            --password-stdin
+
+      - name: Publish Helm Chart
+        working-directory: ${{ github.workspace }}
+        run: |
+          chart=$(find . -name '*.tgz' | sort -r | head -n 1)
+          version=$(basename $chart | sed 's/\.tgz//')
+          
+          docker tag $chart \
+            ghcr.io/${{ github.repository_owner }}/${{ github.repository }}/$version
+          
+          docker push \
+            ghcr.io/${{ github.repository_owner }}/${{ github.repository }}/$version