fix: switch to Actions-based Pages deployment, fix broken links and nav

Author: spazyCZ

.github/workflows/gh-pages.yml

@@ -7,11 +7,20 @@ on:
   workflow_dispatch:
 
 permissions:
-  contents: write
+  contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: pages
+  cancel-in-progress: true
 
 jobs:
   deploy:
     runs-on: ubuntu-latest
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
     steps:
       - uses: actions/checkout@v4
 
@@ -22,5 +31,13 @@ jobs:
       - name: Install MkDocs and dependencies
         run: pip install "mkdocs<2.0" mkdocs-material
 
-      - name: Build and deploy
-        run: mkdocs gh-deploy --force
+      - name: Build
+        run: mkdocs build --strict
+
+      - uses: actions/upload-pages-artifact@v3
+        with:
+          path: site/
+
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4