feat: migrate to TypeScript

[NiedziolkaMichal]

This PR adds TypeScript to the project. I intended to make as small amount of changes as possible, so it's easier to review.

• Added basic dependencies and made ESLint correctly process ts files and ESM
• @typescript-eslint/recommended has a bit more restrictive rules than what was previously present. Because of that, changes in console-utils.test.js and editable-wat.js were required.
• I have changed only extensions of lib files to TS. I didn't change extensions of files from editor/js because there are A LOT of errors that would have to be fixed.
• Compiler has thrown an error about 2 invalid configs from cosmiconfigSync. I have removed them, as cosmicconfig documentation doesn't bring them up and the function works exactly the same way without them.

If everything looks to be fine, I will convert the rest of the files to .ts and add types.

[caugner]

1. You'll want to add a prepack script that runs tsc to automatically transpile TypeScript to JavaScript when packaging. Implicitly this will fail if there are any TypeScript errors. (However, better not add those *.js files to the .gitignore, because it just makes it harder to debug.)
2. You need to update those scripts that run *.js files to call ts-node with the *.ts file instead.

[NiedziolkaMichal]

@caugner Thank you for the guidance, CI/CD was the hardest part for me to figure out. Could you please recheck, when you have a minute?

[caugner]

I think this looks good, and the passing tests confirm this, but maybe @queengooborg could take a second look to make sure I didn't miss anything?

[queengooborg]

Let's take advantage of SWC here as well, help keep things speedy throughout all our repos!

npm i -D @swc/cli @swc/core

And in tsconfig.json:

{
  ...
  "ts-node": {
    "esm": true,
    "files": true,
    "swc": true
  }
}

[NiedziolkaMichal]

@queengooborg Thanks a lot for all of the suggestions. Could you please recheck?