Consider using abscissa for cli and secrets management

[aatifsyed]

We're doing a lot of thinking about

• Breaking up forest into multiple CLIs: https://github.com/ChainSafe/forest/issues/3172
  • Secret keeping etc
• CLI/config file unification https://github.com/ChainSafe/forest/issues/3246

Can we use https://docs.rs/abscissa/latest/abscissa/ to just do all that thinking for us?

[aatifsyed]

@creativcoder What is the acceptance criteria for the work you're thinking of doing?

I don't think you should be porting our CLI to abscissa until it's clear that it's the right thing to do, hence consider.

What are the rough edges of our current approach?

• Inconsistent arguments across the codebase e.g #3407
• Arguments appear that don't make sense for the current operation e.g #2076
• We don't have a good clap/config file unification story: #3182
• We're worried about secrets management: #2274
• Any more?

So the next step on this issue is a write-up, maybe a PoC of a new approach with solves all or some of these issues. Can you articulate why it would be better?

See also #3246 for using other libraries to do this