feat: convert project to typescript, add types

[wonderfulfrog]

Description

This PR updates the project to use TypeScript, and include type definitions when importing the module in other projects.

The node version was also bumped to 20.16.0, which is the current LTS version.

I did my best to break up each change into smaller commits to follow the flow of my changes. I borrowed a few files from wethegit/react-modal to make things easier (e.g. utils/classnames.ts).

Notes

There is a warning about different versions of TypeScript when building the project:

$ npm run build
// Output truncated
Analysis will use the bundled TypeScript version 5.4.2
*** The target project appears to use TypeScript 5.5.4 which is newer than the bundled compiler engine; consider upgrading API Extractor.

There aren't any build errors as a result of this warning. There is a PR open that updates TypeScript to 5.5 for API Extractor. I believe once that PR is merged the warning will disappear.

[marlonmarcello]

Great work @wonderfulfrog !

I'd advice to test this locally in an external project by using npm link.

Just to make sure the build and the types output are as expected.

[andrewrubin]

Looks great @wonderfulfrog, thanks for taking the time to do this 👏

[wonderfulfrog]

Using npm link, I can confirm the latest revision of the build works with a fresh Next.js project. I did have to add "use client" at the top of my file, though (which is expected since react-marquee uses useState).

A fresh corgi project is having issues. It might be a corgi-specific problem, I'm not sure. Here is an error log I'm getting:

TypeError: Cannot read properties of null (reading 'useState')

Error: There was an error while hydrating. Because the error happened outside of a Suspense boundary, the entire root will switch to client rendering.

[marlonmarcello]

The corgi issue is really weird and I have a feeling it might have to do with npm link