DEVELOPMENT ENVIRONMENT

~liljamo/deck-builder

ref: 1fdcbaef30bf4c21ad0d35c16dc7826d83d9f330 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