feature: ability to run nodes in debug mode

[Anmol1696]

Overview

In alot of cases we want to be running the docker containers in debug mode: everything step but not running.

Proposal

Define a new directive: debug mode as enabled.

chains:
- id: cosmoshub-4
  name: cosmoshub
  debug:
    enabled: true
    
relayers:
- name: hermes-1
  type: hermes
  debug:
    enabled: true

If this debug mode is present, then we dont run specific commands in the init container as well as in the main container.

• For validators: we just dont run start command, run everything else
• For relayers: we dont create channels or connections