* Use Theme type everywhere
* Rename Appearance type to Theme for consistency
* Reorder headers in readme
The host don't need to pass hardcoded strings any more and instead can use the exported constant
* support appearance when updating scene data
* works!
* whoops, missed a prop
* hide appearance button when prop is not set
* cleanup
* fix export + rename prop to theme
* rename to showThemeBtn, hide via react instead of css
* adapt to new state name
* add tests and css selector to target the dark mode toggle
* updated changelog and readme
* fix markdown rendering in readme
* pr feedback
