Add option to remove TypeScript from the SvelteKit codebases(WAT, WalletAuth)

[avivash]

CRA and Next both allow you to generate non-TS versions of their codebases. It would be cool we could do the same. tsc, which was a transpiler that enabled this has been deprecated, but it may be worth investigating other solutions Scratch that, apparently tsc lives within the typescript package now. So i'm going to see if it's useable for this 👀

This has been implemented for the React codebases already, but we getting it working for SvelteKit is a bit trickier because I'll need to write a transpiler from scratch, so I've separated this into a separate issue than #2 👍🏼