Feat: Add CustomMessage & CustomReward

[Mangochicken13]

Messages

• CustomMessage abstract class
  • Mainly here to build a hint system for newer modders, so they remember to register a handler method for their message too. This is done through new abstract Initialize and Dispose methods that are called through a bit of a hack (?) in patches on the RunManagerPatches class, which handles the synchronizer setup in the base game.
  • Stretch Goal - If given the chance, try to set up an optional message registration system, so that players with client side mods ("affects_gameplay" : false) can sync optional data without worrying about other client mods conflicting with the current workaround of prefixing the messages with ZZ
• CustomRewardMessage abstract class
  • Additionally implement IRunLocationTargetedMessage,
  • Preset NetTransferMode Mode => NetTransferMode.Reliable and bool ShouldBroadcast => true

Rewards

• Add abstract class CustomReward
  • Patch Reward.FromSerializable to check for custom rewards first
  • Patch RewardSynchronizer to handle custom rewards and associated messages
    • Add struct CustomBufferedMessage
  • Adds TransformCard reward
  • [/] Adds TransformAndUpgradeCard reward Moved functionality into base transform a card reward
• Add ModId prefixing to localization keys for reward screens

[Mangochicken13]

Rebased onto develop & changed merge target