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/renderers/mkdocs_renderer.py

@@ -54,7 +54,7 @@ class MkDocsRenderer:
             out_dir (Path):
                 Directory where generated Markdown files will be written.
 
-            module_is_source (bool, optional):
+            module_is_source (bool | None):
                 If True, treat the specified module as the documentation root
                 rather than nesting it inside a folder.
         """
@@ -87,11 +87,10 @@ class MkDocsRenderer:
         """
         Generate a `README.md` file from the root module docstring.
 
-        Behavior:
-
-        - If `module_is_source` is True, `README.md` is written to the project
-          root directory.
-        - If False, README generation is currently not implemented.
+        Notes:
+            - If `module_is_source` is True, `README.md` is written to the
+              project root directory.
+            - If False, README generation is currently not implemented.
 
         Args:
             project (Project):
@@ -100,10 +99,10 @@ class MkDocsRenderer:
             docs_dir (Path):
                 Directory containing generated documentation sources.
 
-            module_is_source (Optional[bool]):
+            module_is_source (bool | None):
                 Whether the module is treated as the project source root.
 
-            readme_dir (Optional[Path]):
+            readme_dir (Path | None):
                 Directory where the generated README.md should be written.
                 Defaults to the parent of `docs_dir`.
         """
@@ -157,7 +156,7 @@ class MkDocsRenderer:
                 Project model to inspect.
 
         Returns:
-            Optional[Module]:
+            Module | None:
                 The root `Module` if found, otherwise `None`.
         """
         for module in project.get_all_modules():
@@ -189,7 +188,7 @@ class MkDocsRenderer:
             out_dir (Path):
                 Base directory for generated documentation files.
 
-            module_is_source (bool, optional):
+            module_is_source (bool | None):
                 Whether the module acts as the documentation root directory.
         """