refactor(chat): rename dc_chat to chat

src/lib.rs

@@ -23,6 +23,7 @@ mod log;
 mod error;
 
 mod aheader;
+pub mod chat;
 pub mod chatlist;
 pub mod config;
 pub mod constants;
@@ -42,7 +43,6 @@ pub mod types;
 pub mod x;
 
 pub mod dc_array;
-pub mod dc_chat;
 pub mod dc_configure;
 mod dc_dehtml;
 mod dc_e2ee;