Clean up Typescript Code

[crookedneighbor]

The initial conversion to Typescript is complete, but there are a bunch of TODOs and uses of any and Function that need to be addressed.

And I'm sure that there are other things in the repo that could be more typescripty.

[crookedneighbor]

The only thing left to do on this will require some work in scryfall-client to expose the Model types as first class exports and possibly PR to framebus to better handle the types for the callback handlers.