restructure workflows

.github/workflows/prerelease-docs.yml

@@ -0,0 +1,82 @@
+name: Pre-release - Build and publish docs
+
+on:
+  push:
+    tags:
+      - "v*-rc.*"
+  workflow_dispatch:
+
+permissions:
+  contents: write
+
+jobs:
+  prerelease:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout (tag)
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Ensure tag commit is on release-candidate
+        run: |
+          set -euo pipefail
+          git fetch origin release-candidate:refs/remotes/origin/release-candidate
+          if ! git merge-base --is-ancestor "${GITHUB_SHA}" "origin/release-candidate"; then
+            echo "ERROR: Tagged commit ${GITHUB_SHA} is not on release-candidate. Refusing prerelease."
+            exit 1
+          fi
+
+      - name: Setup Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.13"
+          cache: "pip"
+          cache-dependency-path: mkdocs/requirements.txt
+
+      - name: Install dependencies
+        run: |
+          set -euo pipefail
+          pip install -r mkdocs/requirements.txt
+
+      - name: CI gate (MKDOCS_STRICT)
+        run: |
+          set -euo pipefail
+
+          MKDOCS_STRICT="${MKDOCS_STRICT:-true}"
+          STRICT_FLAG=""
+          if [ "${MKDOCS_STRICT}" = "true" ]; then
+            STRICT_FLAG="--strict"
+          fi
+
+          OFFLINE=true mkdocs build ${STRICT_FLAG} -f mkdocs/mkdocs.yml
+
+      - name: Build artifact (non-strict)
+        env:
+          MKDOCS_STRICT: "false"
+        run: |
+          set -euo pipefail
+
+          MKDOCS_STRICT="${MKDOCS_STRICT:-true}"
+          STRICT_FLAG=""
+          if [ "${MKDOCS_STRICT}" = "true" ]; then
+            STRICT_FLAG="--strict"
+          fi
+
+          mkdir -p "${RUNNER_TEMP}/dist"
+          OFFLINE=true mkdocs build ${STRICT_FLAG} -f mkdocs/mkdocs.yml -d "${RUNNER_TEMP}/dist/${{ github.ref_name }}"
+
+      - name: Zip artifact
+        run: |
+          set -euo pipefail
+          cd "${RUNNER_TEMP}/dist"
+          zip -r "${{ github.ref_name }}.zip" "./${{ github.ref_name }}"
+
+      - name: Publish prerelease (skip on act)
+        if: ${{ env.ENABLE_RELEASE == 'true' && env.ACT != 'true' }}
+        uses: softprops/action-gh-release@v2
+        with:
+          prerelease: true
+          files: |
+            ${{ runner.temp }}/dist/${{ github.ref_name }}.zip