DEVELOPMENT ENVIRONMENT

~liljamo/deck-builder

ref: aab10455fd1c6556d71bdbc1756c49e417b6d153 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