Query editor GUI for external DB servers

Provide a feasibility that user can add external DB servers from GUI and able to run queries/ddl/dml/comparisions from the GUI query editor.

EX1: User should be able to run the DML/DDL commands.
EX2: User should be able to sync table structures from source to destination.
EX3: User should be able to sync table data from source to destination.

NOTE: Source can be an external server or can be an internal server. Here internal server means from the maxscale.cnf config file and external means the server is not part of the maxscale.cnf config file. But provide feasibility, user should be able to do cross sources/destination Comparisions or data syncs or table structures Comparisions or etc.