feat: use librechat instead of own chat (#14)

Co-authored-by: Sharang Parnerkar <parnerkarsharang@gmail.com>
Reviewed-on: #14

src/models/mod.rs

@@ -1,17 +1,13 @@
 mod chat;
 mod developer;
-mod knowledge;
 mod news;
 mod organization;
 mod provider;
-mod tool;
 mod user;
 
 pub use chat::*;
 pub use developer::*;
-pub use knowledge::*;
 pub use news::*;
 pub use organization::*;
 pub use provider::*;
-pub use tool::*;
 pub use user::*;