~aleteoryx/lfm_embed

ref: ff0d799cf0e5aaa23596cb27153738ce7add16ec lfm_embed/src d---------
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