Add option to cancel trip and receive full refund

[DayV-git]

Description:

Adds option to cancel trip and be refunded item cost / item charges after 5 mins. Applies to most activities, if you have used any items / charges in the activity. Exceptions: Birdhouse, farming, colosseum / fight caves / inferno, clues, group content including fake masses.

Changes:

• Add \minion cancel_and_refund command
• Add itemCost and chargeCost to activities, indicating what has been removed from user and what to refund
• Add integration test for PvM refunds
• Add JSON-encoding to chargeBank so it can be accessed from prisma
• As a byproduct, fixed message from colosseum to have correct charge usage.

Other checks:

• I have tested all my changes thoroughly.