INIT: Convert ICS Feature to a Complete App

[julienrbrt]

Currently the Ignite consumer app is a sort of fake app. It exists only for not importing ICS in ignite/cli.
However, the templates are still in ignite cli.
We should totally movec the templating logic from ICS to the consumer app (maybe rename to ics).
This way we can iterate faster on the ICS app, without risking getting block on Informal at the next SDK version upgrade.

[julienrbrt]

Additionally we should edit the config.yml with good defaults (based on https://github.com/cosmos/testnets/blob/master/interchain-security/CONSUMER_LAUNCH_GUIDE.md):

• Remove validators entry
• Add genesis modifications (before proposal)

Modifications

genesis:
  chain_id: ccv-1
  genesis_time: "2024-08-02T09:04:18.804524734Z" # must match spawn time in genesis proposal
  app_state:
    ccvconsumer:
      provider:
        client_state:
          chain-id: provider
    slashing:
      params:
        signed_blocks_window: 20000
        min_signed_per_window: "0.5"

• Add genesis modifications with ccv (query the state and do it automatically??)

Modifications

• Verify if validators should or shouldn't be removed from config.yml -> deadcode https://github.com/ignite/cli/blob/e38e58abf9b288444a60c4fd5b79725d5c0a41d1/ignite/services/chain/init.go#L175

[julienrbrt]

ref: ignite/cli#4501. We can make the app compatible with v28 as well, and this is unblocked because we do not need to wait for ICS x 0.52

[julienrbrt]

Looks like the app should support only PSS config instead: https://x.com/0xMagmar/status/1901752853351334017

[julienrbrt]

This should be using Atone ICS.