docs: bring docforge docstrings and wiki to GSDFC standard

- fix GSDFC spec contradictions in __init__ docstring (parenthesized types, fenced-block rule) and sync generated README
- rewrite docstrings across loaders, models, nav, servers, renderers, cli; sync .pyi stubs
- add pydoclint (google style) gate to dev extras and pyproject config
- fix mcp nav resources doc:// -> docs://
- refresh docs/lib and docs/mcp, drop stale docforge/ duplicate group
- update wiki pages and add GSDFC + MCP guides under 05_development

docforge/nav/wiki.py

@@ -20,6 +20,7 @@ modified by doc-forge; only the navigation layout is inferred.
 """
 
 import re
+from collections.abc import Callable
 from pathlib import Path
 from typing import Any
 
@@ -46,7 +47,7 @@ def build_wiki_nav(wiki_dir: Path) -> list[dict[str, Any]]:
             Path to the hand-written wiki directory, for example ``docs/wiki``.
 
     Returns:
-        List[Dict[str, Any]]:
+        list[dict[str, Any]]:
             Navigation entries compatible with the MkDocs ``nav`` configuration.
             The list is empty if the wiki contains no Markdown files.
 
@@ -75,7 +76,10 @@ def build_wiki_nav(wiki_dir: Path) -> list[dict[str, Any]]:
     return nav
 
 
-def _render_entries(base_dir: Path, rel) -> list[dict[str, Any]]:
+def _render_entries(
+    base_dir: Path,
+    rel: Callable[[Path], str],
+) -> list[dict[str, Any]]:
     """
     Render navigation entries for the children of a wiki directory.
 
@@ -87,11 +91,11 @@ def _render_entries(base_dir: Path, rel) -> list[dict[str, Any]]:
         base_dir (Path):
             Directory whose children are rendered.
 
-        rel:
+        rel (Callable[[Path], str]):
             Callable converting a wiki file path into a docs-relative path.
 
     Returns:
-        List[Dict[str, Any]]:
+        list[dict[str, Any]]:
             Navigation entries for ``base_dir`` in natural sort order.
     """
     children = sorted(
@@ -152,7 +156,7 @@ def _natural_key(name: str) -> list[object]:
             Filename or directory name to key.
 
     Returns:
-        List[object]:
+        list[object]:
             Mixed list of lowercased strings and integers used for sorting.
     """
     return [