New Event - Life Insurance

[Malivil]

• [x] Create Event
  • [x] When a traitor is killed, give the remaining alive traitors the insurance amount
• [x] ConVars
  • [x] Only first traitor death (disabled by default)
  • [x] Only first death per player (enabled by default)
  • [x] Number of credits to pay out
• [x] Documentation (Thank Corvatile on the CR for TTT Discord)