feat(client): revamp CfgUser

feat(server, shared): send an AfterAuth payload to the client after auth

feat(server): handle connect, disconnect and error events

fix(client): forgor log

feat(client, server, shared): new login/register

fix(client): wrong title in menu

feat(api): create session on register

feat(shared): derive deserialize for APIError

feat(shared): add cookie support for reqwest

docs: update main readme with more up-to-date details

wip(client): disable runtime data for now

wip(client, server): handle auth and connecting

fix(client): make plugins::menu::ui pub

feat(client): change api_server to server_address in CfgDev

chore(client): remove unused init_networking

feat(server): listen for auth events

feat(client): add separate networking plugin, a few event stubs

feat(client): move connect screen stuff to own module

feat(client): clear connection screen data when switching views

feat(client): ability to show errors in the connect screen