ci: add Helm chart-releaser workflow

Author: GeiserX

.github/cr.yaml

@@ -0,0 +1,6 @@
+owner: GeiserX
+git-repo-url: https://github.com/GeiserX/Pumperly
+charts-repo-url: https://geiserx.github.io/Pumperly
+packages-with-index: false
+index-path: index.yaml
+release-name-template: "{{ .Name }}-{{ .Version }}"

.github/workflows/release-chart.yml

@@ -0,0 +1,35 @@
+name: Release Helm Chart
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - 'charts/pumperly/**'
+      - '.github/workflows/release-chart.yml'
+  workflow_dispatch:
+
+jobs:
+  release:
+    permissions:
+      contents: write
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Configure Git
+        run: |
+          git config user.name "$GITHUB_ACTOR"
+          git config user.email "$GITHUB_ACTOR@users.noreply.github.com"
+
+      - name: Run chart-releaser
+        uses: helm/chart-releaser-action@v1.7.0
+        with:
+          charts_dir: charts
+          config: .github/cr.yaml
+          skip_existing: true
+        env:
+          CR_TOKEN: ${{ secrets.GITHUB_TOKEN }}