feat: ci: add docs-check workflow

Signed-off-by: Eike Waldt <waldt@b1-systems.de>
On-behalf-of: SAP <eike.waldt@sap.com>

Author: yeoldegrove

.github/workflows/docs-check.yml

@@ -0,0 +1,74 @@
+name: Documentation Quality Check
+
+on:
+  pull_request:
+    branches: [main, docs-ng]
+    types: [opened, synchronize, reopened, closed]
+    paths:
+      - 'docs/**'
+  push:
+    branches: [main, docs-ng]
+    paths:
+      - 'docs/**'
+
+jobs:
+  docs-checks:
+    # Skip checks on closed PRs (only need the notification)
+    if: github.event_name != 'pull_request' || github.event.action != 'closed'
+    uses: gardenlinux/docs-ng/.github/workflows/docs-checks.yml@main
+    with:
+      override-repo: ${{ github.event.repository.name }}
+      override-ref: ${{ github.head_ref || github.ref_name }}
+      override-commit: ${{ github.event.pull_request.head.sha || github.sha }}
+
+  notify-docs-ng:
+    name: Notify docs-ng
+    needs: [docs-checks]
+    runs-on: ubuntu-24.04
+    # Only notify for PR events (not push events which lack PR context)
+    # Run after checks pass for open PRs, OR immediately for merged PRs
+    if: |
+      always() &&
+      github.event_name == 'pull_request' &&
+      (
+        (github.event.action == 'closed' && github.event.pull_request.merged == true) ||
+        (github.event.action != 'closed' && needs.docs-checks.result == 'success')
+      )
+    steps:
+      - name: Generate GitHub App token
+        id: app-token
+        uses: actions/create-github-app-token@bcd2ba49218906704ab6c1aa796996da409d3eb1 # v3.2.0
+        with:
+          app-id: ${{ secrets.DOCS_BOT_APP_ID }}
+          private-key: ${{ secrets.DOCS_BOT_PRIVATE_KEY }}
+          repositories: docs-ng
+
+      - name: Send repository dispatch to docs-ng
+        uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7.0.1
+        with:
+          github-token: ${{ steps.app-token.outputs.token }}
+          script: |
+            const isMergedPR = context.payload.action === 'closed' &&
+                               context.payload.pull_request.merged === true;
+
+            // For merged PRs, use the base branch (the branch it was merged into)
+            // For open PRs, use the head branch (feature branch)
+            const ref = isMergedPR
+              ? context.payload.pull_request.base.ref
+              : context.payload.pull_request.head.ref;
+
+            await github.rest.repos.createDispatchEvent({
+              owner: 'gardenlinux',
+              repo: 'docs-ng',
+              event_type: 'docs-pr',
+              client_payload: {
+                repo: '${{ github.event.repository.name }}',
+                pr_number: `${context.payload.pull_request.number}`,
+                commit_sha: isMergedPR
+                  ? context.payload.pull_request.merge_commit_sha
+                  : context.payload.pull_request.head.sha,
+                ref: ref,
+                event: isMergedPR ? 'merged' : 'pr_success'
+              }
+            });
+            core.info('Repository dispatch sent to docs-ng');