chore: improve package exports

[ValentinH]

This is an attempt to fix #490.

However, https://arethetypeswrong.github.io/ is still not fully happy about it. The problem is that we are using bili to build the library and it's not maintain anymore. Ideally, we need to migrate to a fully new setup to build this lib but I'm a bit lost at the moment (and I hate this topic!).

📦 Published PR as canary version: 5.0.7--canary.527.1aad632.0

:sparkles: Test out this PR locally via:

npm install [email protected]
# or 
yarn add [email protected]

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[ValentinH]

Hint: try https://github.com/egoist/tsup and follow https://www.totaltypescript.com/how-to-create-an-npm-package

However, IIRC, last time I tried tsup, I had issues with inlining the CSS into the lib.