feat(client): add flake.nix for easy development

feat(client): enable native wayland for bevy

feat(client): temporary new menu

feat(server, client): handle tick events, sorta

feat(client): handle AfterAuth message

feat(client): revamp CfgUser

fix(client): forgor log

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

fix(client): wrong title in menu

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(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

feat!(client): add new connect ui, and menu stub

feat(client): delete some old belly ui's