v0.1.1

docs: improve docstrings and sync README with docs

Source code docstrings:
- Expand MakeableModel, BoundFunction, DefaultSentinel, recursive_make
- Improve module docstrings for generation, extraction, typedefs, __init__
- Expand wrap_external and _create_type_proxy docs
- Clean up confusing case numbering in _get_config_class

README & docs:
- Add missing Enums, External Components, Function Type Proxies sections to docs/index.md
- Add wrap_external to API reference table in docs
- Rename 'Known Limitations' to 'Design Decisions' in docs
- Add DataLoader context comment to Quick Example
- Fix broken mkdocstrings directive in docs/reference.md