Move Cfg things to a new mod

Create plugins mod, move splash to plugins

Add a temporary version number to the API

Move user cfgs to CfgUser

Register UI, input naming changes

Unused muts

Naming changes

Basic menu layout, missing functionality still

temporary branding logo

Egui and egui inspector deps

Add FiraMono font

Upgrade bevy to 0.9.1

Add window configurations

Update 'README.md'

Basic API with register and login (#1)

Reviewed-on: https://src.quest/skye/deck-builder/pulls/1

Default bevy setup

Add bevy dep

Create cargo project for sdbclient

Update README.md

Initial commit