Add packets for magic-related interactions

[notjuanortiz]

On the 317 revision, there is a total of 5 different packets that can be used to create every spell in the game.

• [ ] Cast on game object (opcode: 35)
• [ ] Cast on ground item (opcode 181)
• [ ] Cast on inventory item (opcode 237)
• [x] Cast on non-player character (opcode 249)
• [x] Cast on player character (opcode 131)

Resource(s): 317 Protocol

Originally posted by @notjuanortiz in https://github.com/luna-rs/luna/issues/98#issuecomment-549014822