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/cli/api_utils.py

@@ -35,7 +35,8 @@ def load_openapi_spec(spec_path: Path) -> dict:
     Load and validate an OpenAPI specification from a JSON file.
 
     Args:
-        spec_path: Path to the OpenAPI JSON specification file.
+        spec_path (Path):
+            Path to the OpenAPI JSON specification file.
 
     Returns:
         dict:
@@ -68,7 +69,8 @@ def derive_metadata(spec: dict) -> OpenAPIMetadata:
     Derive MkDocs site metadata from an OpenAPI spec ``info`` block.
 
     Args:
-        spec: Parsed OpenAPI specification.
+        spec (dict):
+            Parsed OpenAPI specification.
 
     Returns:
         OpenAPIMetadata:
@@ -97,8 +99,10 @@ def generate_api_sources(spec: dict, docs_dir: Path) -> None:
     an ``index.md`` embedding the swagger UI is generated alongside it.
 
     Args:
-        spec: Parsed OpenAPI specification.
-        docs_dir: Directory (for example ``docs/api``) where the swagger
+        spec (dict):
+            Parsed OpenAPI specification.
+        docs_dir (Path):
+            Directory (for example ``docs/api``) where the swagger
             sources are written.
     """
     docs_dir.mkdir(parents=True, exist_ok=True)