Added QualityArmory Documentation (#13)

Author: MackenzieMolloy

docs/shopgui/shops-items-setup.md

@@ -498,6 +498,20 @@ Item from MythicMobs with ID `SKELETON_BOSS_SKULL`
         slot: 0
 ```
 
+#### QualityArmory
+
+Item from QualityArmory with ID `PISTOL`
+
+```yaml
+      1:
+        type: item
+        item:
+          qualityArmory: "PISTOL"
+        buyPrice: 50
+        sellPrice: 25
+        slot: 0
+```
+
 ### Mob spawners
 
 <p class="warn"><b>Note:</b> Remember to use valid material name corresponding to your Minecraft version (<i>SPAWNER