WIP: generalize multisig wallet config interface

[bucko13]

An initial pass to see what the config interface could look like to be generalized to support multiple different config formats. This still only supports ColdCard but you should be able to see how more formats should be easily added on.

I also split out some of the validation and instantiations. I think this makes the API a little more clear and also the unit testing a little more fine grained (though maybe this isn't desired).

TODO:

• Move existing functionality into its own config.js

• Update tests for existing functionality

• Replace existing functionality from coldcard.js

• Add explicit caravan interfaces

• Add interface to convert from a ColdCard config

• Update jsdoc strings

[humanumbrella]

missing some ; at the end of lines - not sure if we care.

couple questions and some nits - we can discuss soon

[bucko13]

@humanumbrella ready for another review. I tried to catch the semi-colons where I could. That should really be getting handled by the linter...

[bucko13]

Noting some requested changes here:

 if (client) {
      assert(
        this.supportedClients.includes(client.type),
        `Client type "${client.type}" not supported`
      )
      this.client = client;
    }

instead of

if (client) {
      assert(
        this.supportedClients.includes(client),
        `Client type "${client}" not supported`
      )
      this.client = client;
    }

* @param {Object} [options.client] - private or public, really only valid for caravan

instead of

* @param {string} [options.client] - private or public, really only valid for caravan

[bucko13]

@humanumbrella feedback addressed.

[humanumbrella]

Just some small notes and changes requested (bringing in the changes from #49 will be important)

[humanumbrella]

i didnt compare line by line but this would be good to compare how they do it vs how you've done it
https://github.com/Coldcard/firmware/blob/master/shared/multisig.py#L523

[bucko13]

Ah, good reference. Thanks!

[dhruvbansal]

ConfigAdapter -> MultisigWalletConfig
KEYSTORE -> keystore XOR coordinator or something like target (?)
jsonConfig -> braids or braidSet
add options