Update all forge event code, attempt to become loader unaware

[Thodor12]

Changes proposed in this pull request

• Introduce a new event handler in the IMinecoloniesAPI, which is backed by an interface containing basic methods for the events we want to send
• Event handler is implemented in such a way it could be made loader unaware in the future if needed.
• All logic for sending Forge specific events is ripped out in favor of the API event handler

Testing

• Yes I tested this before submitting it.
• I also did a multiplayer test.

Review please