I'm realizing with this code that I'm going to have a problem if I want
to do HATEOAS-style APIs. chi just doesn't do resource-oriented API
design, and I'd have to build a lot of stuff myself.
I'm in the middle of swapping out the UI. Now is the time to make the
switch.
The goal of this rework is to make it so I can pass around platform.User
instead of a pair of models.Organization and models.User. This is useful
for reason I kind of forget now, but it started with working on
notifications and ballooned massively from there into refactoring a
number of things that were bugging me.
This also includes a tiny amount of work on server-side events (SSE).
* background stuff lives inside the platform now, which I need for
having it push updates through SSE
* userfile now lives in the platform, under file, so other platform
functions can safely use it
* oauth is broken into pieces and inside platform because other stuff
was calling it already, but badly.
* notifications go into the platform as well
