Auto-Repair when visiting vendor

[sebid]

• [x] - Option to turn on and off auto-repair.
• [x] - Option to turn on and off printing in chat.
• [x] - Option to turn on and off guild repair, if available, use guild funds before player funds.
• [x] - Auto-repairs at any vendor that has the capability.
• [x] - Use guild funds first if available to repair.
• [x] - Do not repair if no available funds, print error in chat.
• [x] - Print in chat repair cost (or guild cost, can be partial if guild repair cap).

Nice to have:

• Track durability somehow on vendor?
• Track repair statistics (check achi statistics)?

[sebid]

Implemented in branch, did not implement partial repair, for now.

Known bugs: Repair sound doesn't play :(