Convert codebase from TypeScript to JavaScript

[staltz]

Benefits:

• Is more approachable as a codebase to maintain, especially in the SSB community
• Still does type checking, just like before, but via JSDoc comments
• Does not require transpilation as a step when publishing
• When debugging stacktraces, we're debugging the source code, not transpiled code (and without source maps)

This PR is a pretty direct 1:1 mapping from TypeScript to JavaScript without additional changes.

[socket-security[bot]]

New and updated dependencies detected. Learn more about Socket for GitHub ↗︎

Packages	Version	New capabilities	Transitives	Size	Publisher
@types/debug	4.1.8	None	+1	10.5 kB	types
typescript	4.5.5...5.1.6	None	+0/-0	40.1 MB	typescript-bot

[staltz]

One thing I don't know is what this new js-docs thing is or how to test it/ fix it if I break stuff. Can you put a comment in the README about what it is and how to learn more?

It's now part of the tests, when you (or CI) runs npm test, the types will be checked. The type errors (if any) are instructive enough and are shown in details in the terminal output, like a compiler should.

[staltz]

Thanks for reviewing!