feat: centralize projects

[bashbunni]

the projects get created and stored in the dir where you run pjs. This should be a central location with the option to change the default location with env variables

[nicfitzgerald]

Could the option be set using a library like Viper? It has the option to set and read from environment variables or a configuration file.

[nicfitzgerald]

I threw together a quick example of using a centralized config/database path here. I used $XDG guidelines per this comment.