feat: add genesis balances subcommand

[zivkovicmilos]

Description

This PR introduces the genesis balances subcommand, as outlined in #1230.

Closes #1230

Contributors' checklist...

• Added new tests, or not needed, or not feasible
• Provided an example (e.g. screenshot) to aid review or the PR is self-explanatory
• Updated the official documentation or not needed
• No breaking changes were made, or a BREAKING CHANGE: xxx message was included in the description
• Added references to related issues and PRs
• Provided any useful hints for running manual tests
• Added new benchmarks to generated graphs, if any. More info here.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (505ed60) 47.87% compared to head (b121454) 47.80%.

Additional details and impacted files

@@               Coverage Diff                @@
##           feat/genesis    #1276      +/-   ##
================================================
- Coverage         47.87%   47.80%   -0.07%     
================================================
  Files               369      369              
  Lines             62909    62739     -170     
================================================
- Hits              30120    29995     -125     
+ Misses            30325    30317       -8     
+ Partials           2464     2427      -37     

see 30 files with indirect coverage changes

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[ajnavarro]

Lgtm apart from the "parse all sources" conversation