* [Commands] Consolidate #merchant_close_shop and #merchant_open_shop to #merchantshop
# Notes
- `#merchant_close_shop` and `#merchant_open_shop` are now consolidated into `#merchantshop`.
- Command now works on any type of merchant instead of just regular merchants.
- Can be used on Merchants, Discord Merchants, Adventure Merchants, Norrath's Keepers Merchants, Dark Reign Merchants, and Alternate Currency Merchants.
* Update merchantshop.cpp
* Update merchantshop.cpp
* Update merchantshop.cpp