Implementation of the markets feature into the development branch

[Byte-Nova]

This PR adds the global market feature into the game.

Summary of the global market:

• Wireless trading of items (everyone can trade with each other in the same server).
• Trades are given a taxed markup against the seller, since they are trading using long range.
• Requires a Comms Console to be accessible, will probably be changed to something themed with our mod later down the line.
• Allows trading even if the other player is disconnected from the server, since the items are stored in the server.