~aleteoryx/lfm_embed

ref: be166d93b7aabb5b260e21c10b1b247704858193 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