[Bug] theme (colorscheme, hue) not persisted to server session

[chris-kruining]

in production changes to the theme are either not properly persisted, or not used/loaded during ssr. This results in the colorscheme dropdown and hue slider resetting on reload

[chris-kruining]

alright most of this seems to be solved. pretty sure the root cause was the prerendering of the routes.

only issue still remains is that the sessions are now lost on re-deployments of the app.
I can either:

1. persist server sessions to something outside of the app (perhaps this is a task for dapr)
2. make the server stateless again. this is preferable I think, but at that point there really is no reason for solidStart with ssr anymore. not until I create some server only stuff again in the future