Frankie/i#376 tsc

[mixmix]

Changes TS build:

• use tsc (no build step)
• change every relative import to specify file extension
  • this is a hard requirement of type: module ESM setup 😢
  • side-stepping would require a more sugary build-tool
• trim the tsconfig.json down, leave important notes

The tests all pass, BUT I've not been able to yarn link it in to @entropyxyz/cli because dev is broken at the moment.... oh I should try it in main...

[mixmix]

NOTE a lot of the ugliness of import { thing } from './utils/index.js' is because we have been leaning on the default CJS pattern of "yeah gimme a folder and I'll try the index.js file I guess".

If we re-work file/folder structure we can make it nicer like import { thing } from './utils.js'

[frankiebee]

Instead of changing the imports everywhere lets try to alias them?
https://www.typescriptlang.org/tsconfig/#paths
https://webreaper.dev/posts/tsconfig-paths-setup/

[frankiebee]

closing in favor of #402