create basic disperse command for cli

[colomvax]

Describe your changes

This PR is a suggestion of addition for a new command in the CLI for Namada, which could be very useful for a data protection oriented blockchain.
It gets its inspiration from the "disperse" contract on Ethereum, which allows a user to send X to N addresses in one single transaction.

I know the implementation is not perfect/complete, because as it is, it sends N txs, instead of a single one, but Im not advanced enough in Rust or my comprehension of Namada codebase to go further than that. But I hope this provides a useful starter to add this command !

This would probably benefit from having its own VP and wasm, as it looks a lot like a simple transfer but to be able to run it in a single tx, it requires to wrap multiple tx inside the inner/wrapper txs. Not sure how to do that, way beyond me 😄

Indicate on which release or other PRs this topic is based on

Checklist before merging to draft

• I have added a changelog
• Git history is in acceptable state

[cwgoes]

Very nice, thank you for the contribution! We've recently added batch transaction support (many inner transactions in one) - I'm wondering, would that address the use-case you have in mind here?

[grarco]

I believe this was implemented in #3459

[Fraccaman]

As @grarco said, this was implemented in #3459, closing this! Thanks for the PR anyway!