Add workflows for chart lint, test and release

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+labels: bug, kind/bug
+
+---
+
+**What steps did you take and what happened:**
+[A clear and concise description of what the bug is.]
+
+**What did you expect to happen:**
+
+**Anything else you would like to add:**
+[Miscellaneous information that will assist in solving the issue.]
+
+**Environment:**
+- OS (e.g. from `/etc/os-release`):
+- Kubernetes version: (use `kubectl version`):
+- Chart version:
+
+<details><summary>Values</summary>
+
+</details>

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for this project
+labels: enhancement, kind/feature
+
+---
+
+**Describe the solution you'd like:**
+[A clear and concise description of what you want to happen.]
+
+
+**Anything else you would like to add:**
+[Miscellaneous information that will assist in solving the issue.]

.github/PULL_REQUEST_TEMPLATE.md

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+## What does this fix or implement?
+
+<!-- Enter details of the change here. Include additional tests that have been done, reference to the issue for tracking, etc. -->
+
+## Checklist
+
+<!-- Please check the completed items below -->
+<!-- Not all changes require documentation updates or tests to be added or updated -->
+
+- [ ] PR title contains [conventional commit](https://www.conventionalcommits.org/en/v1.0.0/) markers (`feat:`, `fix:`, `docs:`, etc.)
+- [ ] Helm chart version bumped
+- [ ] Tests added or updated
+- [ ] Documentation updated
+- [ ] GitHub issue linked if any

.github/dependabot.yml

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+---
+version: 2
+updates:
+- package-ecosystem: "docker"
+  directory: "/"
+  schedule:
+    interval: "weekly"
+  commit-message:
+    prefix: "chore:"
+
+- package-ecosystem: "github-actions"
+  directory: "/"
+  schedule:
+    interval: "daily"
+  commit-message:
+    prefix: "chore:"

.github/workflows/chart-ci.yml

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+name: Chart CI
+
+on:
+  pull_request:
+    paths:
+      - 'charts/**'
+      - .github/workflows/chart-verify.yml
+
+jobs:
+  helm-lint-test:
+    name: Helm chart
+    runs-on: ubuntu-latest
+    env:
+      CT_TARGET_BRANCH: ${{ github.event.repository.default_branch }}
+      CT_CHART_DIRS: charts
+      CT_GITHUB_GROUPS: "true"
+      CT_USE_HELMIGNORE: "true"
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4.1.4
+        with:
+          fetch-depth: 0
+
+      - name: Set up Helm
+        uses: azure/setup-helm@v4.2.0
+
+      - name: Set up python
+        uses: actions/setup-python@v5.1.0
+        with:
+          python-version: '3.x'
+
+      - name: Set up chart-testing
+        uses: helm/chart-testing-action@v2.6.1
+
+      - name: Run chart-testing (lint)
+        run: ct lint
+
+      - name: Prepare host path mounts
+        run: |
+          mkdir -p ${{ runner.temp }}/run/udev/data
+          cat > ${{ runner.temp }}/kind-config.yaml <<EOM
+          kind: Cluster
+          apiVersion: kind.x-k8s.io/v1alpha4
+          nodes:
+          - role: control-plane
+            extraMounts:
+            - hostPath: ${{ runner.temp }}/run/udev/data
+              containerPath: /run/udev/data
+              propagation: None
+          EOM
+
+      - name: Create kind cluster
+        uses: helm/kind-action@v1.10.0
+        with:
+          config: ${{ runner.temp }}/kind-config.yaml
+
+      - name: Create dummy secret
+        run: |
+          kubectl -n kube-system create secret generic dummy --from-literal token=test
+
+      - name: Install required CRDs
+        run: |
+          kubectl apply -f https://raw.githubusercontent.com/prometheus-operator/prometheus-operator/main/example/prometheus-operator-crd/monitoring.coreos.com_podmonitors.yaml
+
+      # TODO(avorima): Install chart using ct once packages are available
+      - name: Install helm chart (dry-run)
+        run: >
+          helm show crds $CHART | kubectl apply -f -;
+          helm install ionoscloud-blockstorage-csi-driver $CHART -n kube-system -n kube-system -f $CHART/ci/ct-values.yaml --dry-run -o json | jq -r '.manifest' |
+          kubectl apply --dry-run=server --validate=true -f -
+        env:
+          CHART: ./charts/ionoscloud-blockstorage-csi-driver
+
+
+  helm-docs-validate:
+    name: Helm docs
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4.1.4
+      - name: Run helm-docs
+        uses: docker://jnorwood/helm-docs:v1.13.1
+      - name: Check for changes
+        run: git diff --quiet charts/*/README.md

.github/workflows/chart-release.yml

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+name: Chart release
+
+on:
+  push:
+    branches:
+    - main
+    paths:
+      - 'charts/**/Chart.yaml'
+
+jobs:
+  publish-chart:
+    name: Publish chart
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4.1.4
+
+      - name: Configure Git
+        run: |
+          git config user.name "$GITHUB_ACTOR"
+          git config user.email "$GITHUB_ACTOR@users.noreply.github.com"
+
+      - name: Set up Helm
+        uses: azure/setup-helm@v4.2.0
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v3.1.0
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Publish chart to GitHub Container Registry
+        run: ./hack/publish-chart.sh

charts/ionoscloud-blockstorage-csi-driver/ci/ct-values.yaml

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+tokenSecretName: dummy

hack/publish-chart.sh

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+#!/usr/bin/env bash
+
+set -o errexit
+set -o pipefail
+set -o nounset
+if [[ "${TRACE-0}" == "1" ]]; then
+    set -o xtrace
+fi
+
+OCI_HELM_CHART_REPO=ghcr.io/ionos-cloud/helm-charts
+
+for chart in charts/*; do
+    chart_name=${chart#*/}
+    chart_version=$(yq -r '.version' "$chart/Chart.yaml")
+    if ! helm show chart "oci://$OCI_HELM_CHART_REPO/$chart_name" --version "$chart_version" >/dev/null; then
+        helm package "$chart"
+        echo "Publish $chart_name $chart_version"
+        if [[ -n ${DRY_RUN-} ]]; then
+            continue
+        fi
+        helm push "$chart_name-$chart_version" "oci://$OCI_HELM_CHART_REPO/$chart_name"
+    fi
+done

hack/update-crds.sh

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+#!/usr/bin/env bash
+
+set -o errexit
+set -o pipefail
+set -o nounset
+if [[ "${TRACE-0}" == "1" ]]; then
+    set -o xtrace
+fi
+
+BASE_DIR=$(mktemp -d)
+trap 'rm -rf $BASE_DIR' EXIT
+
+if [[ $# -eq 0 ]]; then
+    TAG=$(yq -r '.snapshotter.image.tag' charts/ionoscloud-csi-driver/values.yaml)
+else
+    TAG=$1
+fi
+
+git clone https://github.com/kubernetes-csi/external-snapshotter --no-checkout "$BASE_DIR"
+(
+    cd "$BASE_DIR"
+    git sparse-checkout set client/config/crd
+    git checkout "$TAG"
+)
+cp "$BASE_DIR/client/config/crd/"snapshot.*.yaml charts/ionoscloud-csi-driver/crds/