aiscriptdev#45)

* Make ai config more intuitive

* Support override default model name

* Skip unsupported model test

* Fix testings under ai_test feature

Split static_collect! macro into two variants to handle sized vs unsized types:
- static_collect_sized! for types that implement Sized (implements needs_trace)
- static_collect! for potentially unsized types (skips needs_trace)

This fixes clippy warnings about needs_trace() not being usable for unsized
types like str, CStr, Path, and OsStr due to the Sized bound in the trait.

Also removed needs_trace() implementations from:
- &'static T (where T: ?Sized)
- [T] (slice type is inherently unsized)

The trait's default implementation handles the optimization check for sized
types, while unsized types simply don't provide the method.