now with llama.cpp support for running LLMs locally

This release has better non-openai provider support. Most notably llama.cpp and deepseek work now.

See blog post for details on using chatcraft with llama.cpp.

Changes

• simplify message format, improve unofficial-openai provider compatibility by @tarasglek in #661
• make model listing llama.cpp friendly by @tarasglek in #662

Full Changelog: v2.2.0...v2.2.1