Implement currency and faith for player (no features)

[kida31]

Implement basic currency and faith. Some pointers (not a definitive list)

• Positive numerical values
• Should be easily accessible (read) (from player object or globally)
• "Write" is not specified (maybe directly? or event?)
• emit event/signal when it changes

[lavenderaddict]

@VeryUnlucky pls approve and then close hihi

[VeryUnlucky]

LGTM