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/object.py

@@ -7,6 +7,14 @@ This module defines the `DocObject` class, the fundamental recursive unit of
 the doc-forge documentation model. Each `DocObject` represents a Python
 entity such as a class, function, method, or attribute, and may contain nested
 members that form a hierarchical documentation structure.
+
+---
+
+Notes:
+    - `DocObject` instances form a tree mirroring the Python import hierarchy.
+    - Objects are renderer-agnostic and may be consumed by any renderer.
+
+---
 """
 
 from collections.abc import Iterable
@@ -30,13 +38,13 @@ class DocObject:
         path (str):
             Fully qualified dotted path to the object.
 
-        signature (Optional[str]):
+        signature (str | None):
             Callable signature if the object represents a callable.
 
-        docstring (Optional[str]):
+        docstring (str | None):
             Raw docstring text extracted from the source code.
 
-        members (Dict[str, DocObject]):
+        members (dict[str, DocObject]):
             Mapping of member names to child `DocObject` instances.
     """
 
@@ -61,10 +69,10 @@ class DocObject:
             path (str):
                 Fully qualified dotted path of the object.
 
-            signature (Optional[str]):
+            signature (str | None):
                 Callable signature if applicable.
 
-            docstring (Optional[str]):
+            docstring (str | None):
                 Documentation string associated with the object.
         """
         self.name = name
@@ -82,7 +90,8 @@ class DocObject:
         nested objects to their parent containers.
 
         Args:
-            obj: Documentation object to add as a member.
+            obj (DocObject):
+                Documentation object to add as a member.
         """
         self.members[obj.name] = obj