type-sitter-lib: type-sitter code for generated / downstream code

See type-sitter for background information. This is the library which code generated from type-sitter depends on at runtime.

Instead of depending on this, typically you should depend on type-sitter instead and, if necessary, use-default-features = false to avoid depending on type-sitter-proc. type-sitter with no features simply re-exports this crate.