👷 Upgrade build docs configs (#1047)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

scripts/mkdocs_hooks.py

@@ -0,0 +1,38 @@
+from typing import Any, List, Union
+
+from mkdocs.config.defaults import MkDocsConfig
+from mkdocs.structure.files import Files
+from mkdocs.structure.nav import Link, Navigation, Section
+from mkdocs.structure.pages import Page
+
+
+def generate_renamed_section_items(
+    items: List[Union[Page, Section, Link]], *, config: MkDocsConfig
+) -> List[Union[Page, Section, Link]]:
+    new_items: List[Union[Page, Section, Link]] = []
+    for item in items:
+        if isinstance(item, Section):
+            new_title = item.title
+            new_children = generate_renamed_section_items(item.children, config=config)
+            first_child = new_children[0]
+            if isinstance(first_child, Page):
+                if first_child.file.src_path.endswith("index.md"):
+                    # Read the source so that the title is parsed and available
+                    first_child.read_source(config=config)
+                    new_title = first_child.title or new_title
+            # Creating a new section makes it render it collapsed by default
+            # no idea why, so, let's just modify the existing one
+            # new_section = Section(title=new_title, children=new_children)
+            item.title = new_title
+            item.children = new_children
+            new_items.append(item)
+        else:
+            new_items.append(item)
+    return new_items
+
+
+def on_nav(
+    nav: Navigation, *, config: MkDocsConfig, files: Files, **kwargs: Any
+) -> Navigation:
+    new_items = generate_renamed_section_items(nav.items, config=config)
+    return Navigation(items=new_items, pages=nav.pages)