feature: Typescript

[marlonmarcello]

Goal

To add types!

I also added a new hook useStickerbook that handles all the state and actions.
Should be a much nicer and simpler DX now.

Notes

I also made a few other improvements.

1. We now have a single file output, with named exports, much nicer DX when using it
2. We are using CSS modules! No more style leaking on embed websites. I also added data- attributes to the elements so it's easier to select when using it.

Still need to update the Docs!

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[liamegan]

LGTM too big for a proper review, but in general I think it looks great.

[marlonmarcello]

Deploying it with a beta flag so we can do some integration testing.