DEVELOPMENT ENVIRONMENT

~liljamo/deck-builder

ref: 1e00855d67f5580c8d446a0d24621986e4dae0b5 deck-builder/sdbclient/src/cfg d---------
Change CfgHidden to CfgDev
Constants for Cfg filenames
Serde for Cfg structs
Serde for Cfg structs
New CfgUser fields
Add ProjectDirs resource
Move Cfg things to a new mod