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

docs/wiki/05_development/01_environment.md

@@ -8,7 +8,7 @@ python -m venv .venv
 pip install -e .
 ```
 
-Requires Python 3.11+.
+Requires Python 3.10+ (per `pyproject.toml`).
 
 ## Dependencies
 
@@ -17,4 +17,5 @@ Development extras include:
 - `pytest`, `pytest-cov` — test suite and coverage
 - `ruff` — lint and format checking
 - `black` — auto-formatting
-- `mypy` — strict typing checks
+- `mypy` — strict typing checks
+- `pydoclint` — docstring ↔ signature consistency checks