debugger: Removed module Breakpoint, moved Breakpoint class to debugger module

Signed-off-by: Lucas Bajolet <r4pass@hotmail.com>
debugger: Added help/bad_command functions

Signed-off-by: Lucas Bajolet <r4pass@hotmail.com>
debugger: Simplified names and integrate bad_command/help functions

Signed-off-by: Lucas Bajolet <r4pass@hotmail.com>