Use _promote_charm.yaml (#391)

Use `charmcraft promote` and auto-generate release notes

Author: carlcsaposs-canonical

.github/release.yaml

@@ -0,0 +1,8 @@
+changelog:
+  categories:
+    - title: Features
+      labels:
+        - enhancement
+    - title: Bug fixes
+      labels:
+        - bug

.github/workflows/check_pr.yaml

@@ -0,0 +1,18 @@
+# Copyright 2025 Canonical Ltd.
+# See LICENSE file for licensing details.
+name: Check pull request
+
+on:
+  pull_request:
+    types:
+      - opened
+      - labeled
+      - unlabeled
+      - edited
+    branches:
+      - main
+
+jobs:
+  check-pr:
+    name: Check pull request
+    uses: canonical/data-platform-workflows/.github/workflows/[email protected]

.github/workflows/promote.yaml

@@ -0,0 +1,36 @@
+# Copyright 2025 Canonical Ltd.
+# See LICENSE file for licensing details.
+name: Promote charm
+
+on:
+  workflow_dispatch:
+    inputs:
+      from-risk:
+        description: Promote from this Charmhub risk
+        required: true
+        type: choice
+        options:
+          - edge
+          - beta
+          - candidate
+      to-risk:
+        description: Promote to this Charmhub risk
+        required: true
+        type: choice
+        options:
+          - beta
+          - candidate
+          - stable
+
+jobs:
+  promote:
+    name: Promote charm
+    uses: canonical/data-platform-workflows/.github/workflows/[email protected]
+    with:
+      track: '8.0'
+      from-risk: ${{ inputs.from-risk }}
+      to-risk: ${{ inputs.to-risk }}
+    secrets:
+      charmhub-token: ${{ secrets.CHARMHUB_TOKEN }}
+    permissions:
+      contents: write  # Needed to update git tags