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/servers/mcp_server.py

@@ -5,6 +5,16 @@ MCP server implementation.
 
 This module defines the `MCPServer` class, which serves pre-generated
 documentation bundles through the Model Context Protocol (MCP).
+
+---
+
+Notes:
+    - The served bundle is generated offline by `MCPRenderer`.
+    - Missing resources are reported as structured error dictionaries rather
+      than raising exceptions.
+    - The server exposes read-only resources and a single health-check tool.
+
+---
 """
 
 from __future__ import annotations
@@ -22,6 +32,14 @@ class MCPServer:
 
     The server exposes documentation resources and diagnostic tools through
     MCP endpoints backed by JSON files generated by the MCP renderer.
+
+    Attributes:
+        mcp_root (Path):
+            Directory containing the generated MCP documentation bundle.
+
+        app (FastMCP):
+            Underlying FastMCP application instance that registers resources
+            and tools.
     """
 
     def __init__(self, mcp_root: Path, name: str) -> None: