Update dependencies Feb 2024 & unpin peer deps

Fix styling bugs from 0.0.16 release

Add dark mode styling and bug fixes

Refactor internals + improve test coverage

Fix z-index css bug

Add window expandability and better markdown styling/rendering

Remove ESM module dependencies

Add markdown rendering and chat select for user copy/paste

Add promo-types package + fix minor documentation bugs

Improve promoData prop typing + exports and tests