Add economy to be separated

[geogdog]

Description

Is your feature request related to a problem?

On a server with multiple game modes (BSkyBlock, Boxed, AcidIsland) the Vault economy is shared on the server level.

Describe the solution you'd like us to implement.

Something like the Multi World Money plugin (that mr tastybento sir wrote). The configuration for the economy should be the same as the inventories...just add money to the enabled things.

Describe alternatives you've considered.

Other plugins...but nothing as lightweight as this solution.

Additional context

n/a