Adds the Contract of Apprenticeship

[NoooneyDude]

• Adds the Contract of Apprenticeship. Continues First Implementation of the Wizard Antagonist B : 100 #5160.
  
  (actual timeout period is 15 seconds)
• Fixes ghost role on server timeout triggering when ghost role had already been removed.

Note:

• not tested on headless; seems to be a develop issue.
• artifact refunding is not currently implemented.

CL:Added Contract of Apprenticeship.

[NoooneyDude]

Regarding the Codacy warnings:

• ContractOfApprenticeship.OnGhostRoleTimeout event is actually invoked; see line 64 of the same file - you can see it working as intended in the gif.
• The float comparison warnings can be ignored as we're setting a specific integer value for two specific cases; this value was not derived from maths with float.