Better organize genesis commands in root CLI

[ValarDragon]

Summary & Proposal

Theres currently 4-5 CLI commands in the root genesis of every chain binary:

  add-genesis-account      Add a genesis account to genesis.json
  add-wasm-genesis-message Wasm genesis subcommands
  collect-gentxs           Collect genesis txs and output a genesis.json file
  gentx                    Generate a genesis tx carrying a self delegation
  prepare-genesis          Prepare a genesis file with initial setup

It'd be great to organize all of these into a genesis sub-command. Perhaps with some backwards compatability available for existing shell scripts?

Problem Definition

The current root CLI interface is too bloated for users. Osmosis' doesn't even fit on a full terminal screen of my laptop... Only 3 are custom commands osmosis added

[pysel]

I will look into it if that is ok