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/04_iterative_workflow.md

@@ -8,11 +8,14 @@ A docs build runs through the CLI in a single pass.
 # Library reference only
 doc-forge build --mkdocs --module docforge
 
-# Wik + library combined (single MkDocs build)
+# Wiki + library combined (single MkDocs build)
 doc-forge build --wiki --mkdocs --module docforge
 
 # Wiki only — no module required
 doc-forge build --wiki --site-name docforge
+
+# MCP structured bundle
+doc-forge build --mcp --module docforge
 ```
 
 ## What a combined build does
@@ -29,5 +32,12 @@ doc-forge build --wiki --site-name docforge
 
 ```bash
 doc-forge build --wiki --mkdocs --module docforge
-doc-forge serve --mkdocs-yml mkdocs.yml
+doc-forge serve --mkdocs --mkdocs-yml mkdocs.yml
+```
+
+## Serve the MCP bundle
+
+```bash
+doc-forge build --mcp --module docforge
+doc-forge serve --mcp --module docforge
 ```