mcp_server_collection now also a library

own_assist now bundles the server collection by default

common/src/exit_error.rs

@@ -2,7 +2,7 @@ use std::fmt::Display;
 
 pub fn exit_with_error_message(error: impl Display, message: impl Display) {
     log::error!("{message}: {error}");
-    eprintln!("{}", message); // makes sure that message is printed even if logging is deactivated
+    eprintln!("{message}: {error}"); // makes sure that message is printed even if logging is deactivated
     std::process::exit(1);
 }