Cli refactor: move cluster query-related functionalities (#6244)

* Reorder and label parse_command's giant match

* Move cluster query processing into separate module

* Reorder and label process_command match

cli/src/lib.rs

@@ -2,6 +2,7 @@
 extern crate lazy_static;
 
 pub mod cli;
+pub mod cluster_query;
 pub mod config;
 pub mod display;
 pub mod input_parsers;