restructure workflows

.github/workflows/ci-docs.yml

@@ -0,0 +1,43 @@
+name: CI - Docs build check
+
+on:
+  pull_request:
+    branches: [release-candidate]
+  push:
+    branches: [release-candidate]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  build-check:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.13"
+          cache: "pip"
+          cache-dependency-path: mkdocs/requirements.txt
+
+      - name: Install dependencies
+        run: |
+          set -euo pipefail
+          pip install -r mkdocs/requirements.txt
+
+      - name: MkDocs build
+        run: |
+          set -euo pipefail
+
+          MKDOCS_STRICT="${MKDOCS_STRICT:-true}"
+          STRICT_FLAG=""
+          if [ "${MKDOCS_STRICT}" = "true" ]; then
+            STRICT_FLAG="--strict"
+          fi
+
+          OFFLINE=true mkdocs build ${STRICT_FLAG} -f mkdocs/mkdocs.yml