~aleteoryx/lfm_embed

ref: f548d2d297bbf452aa206042f2029d7137df0477 lfm_embed/src d---------
Remove redundant HTML escaping helpers.
fix typo in plain theme breaking light mode.
Create plain theme, do some escaping, fix some busted envvars, document themes.
lots of stuff. theming basically done, added some logging, frontend basically done.
pull down user info
fix packages, implement caching
API deserialization structs