Add Misc Items from @voiperr

Original PR acemod/ACE3#2324

Author: thojkooi

addons/misc_items/$PBOPREFIX$

@@ -0,0 +1 @@
+z\acex\addons\miscitems

addons/misc_items/CfgVehicleClasses.hpp

@@ -0,0 +1,5 @@
+class CfgVehicleClasses {
+    class ACEX_Misc_Items {
+        displayName = CSTRING(Category);
+    };
+};