feat: add command to modify genesis before import

[kingpinXD]

Description

• Adds a command to zeta cored which accepts two genesis files

  1. A newly created genesis file to start a network
  2. An exported genesis file

  It copies over the required data from the exported file so that the genesis file can be used to start a network with some state data.

Closes: #1422

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Include instructions and any relevant details so others can reproduce.

• Tested CCTX in localnet
• Tested in development environment
• Go unit tests
• Go integration tests
• Tested via GitHub Actions

Checklist:

• I have added unit tests that prove my fix feature works

[lumtis]

@CharlieMc0 for new suggestions

[skosito]

lgtm, just couple of comments, mainly to add some details on modification part for clarity

[lumtis]

Looks good to me if it has been tested live