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/models/module.py

@@ -7,6 +7,13 @@ This module defines the `Module` class used in the doc-forge documentation
 model. A `Module` acts as a container for top-level documented objects
 (classes, functions, variables, and other members) discovered during
 introspection.
+
+---
+
+Notes:
+    - Only public members are stored; private names are filtered by the loader.
+
+---
 """
 
 from collections.abc import Iterable
@@ -26,10 +33,10 @@ class Module:
         path (str):
             Dotted import path of the module.
 
-        docstring (Optional[str]):
+        docstring (str | None):
             Module-level documentation string, if present.
 
-        members (Dict[str, DocObject]):
+        members (dict[str, DocObject]):
             Mapping of object names to their corresponding `DocObject` representations.
     """
 
@@ -45,7 +52,7 @@ class Module:
             path (str):
                 Dotted import path identifying the module.
 
-            docstring (Optional[str]):
+            docstring (str | None):
                 Module-level documentation text, if available.
         """
         self.path = path