Add builder script again

[Rubilmax]

GitHub dropped my work last friday, so here is the true last version of this tool. I am angry.

This PR introduces the builder script, which is completely independent from the other scripts already shipped in this repository. The builder script has nodejs dependencies, but no direct interfaces with forge scripts are available. Instead, the builder script simply builds a tx.json for the user, who's free to use it or replace it with their own.

[MathisGD]

I'm not a big fan of adding "a lot" of dependancies to this "critical" repo. I have in mind the arguments of the well known dependancies, of the yarn.lock, and of the fact that scripts are independent but idk I'm still a little bit less confortable when the dependancies goes to number that I can't quickly "audit". No veto though, if you think that the feature is really worth it.

PS: I didn't review the PR.

[Rubilmax]

I'm not a big fan of adding "a lot" of dependancies to this "critical" repo. I have in mind the arguments of the well known dependancies, of the yarn.lock, and of the fact that scripts are independent but idk I'm still a little bit less confortable when the dependancies goes to number that I can't quickly "audit". No veto though, if you think that the feature is really worth it.

PS: I didn't review the PR.

The feature solves the following issue:

• it is difficult to build a multisend governance tx if Gnosis frontend is down

How would the Morpho DAO pause supply and borrow only for specific (or all) markets otherwise (genuinely asking)? Creating and signing N (nb of markets) txs?

We can also export the script to another repository, given it is completely independent from the tx signature scripts

[MerlinEgalite]

We can also export the script to another repository, given it is completely independent from the tx signature scripts

That a suggestion from @julien-devatom. Should we?

[Rubilmax]

We can also export the script to another repository, given it is completely independent from the tx signature scripts

That a suggestion from @julien-devatom. Should we?

Let's make it an npx script then, the UX will be even better. Working on it.

[Rubilmax]

Let's make it an npx script then, the UX will be even better. Working on it.

Done: https://github.com/morpho-labs/create-safe-tx

[MerlinEgalite]

Should we add more information about the dependency? Anyway LGTM