Removes Weapons (#7415)

* Adds icon and hitsound where needed.

* Moves alt_attack to /obj/item and deletes weapons.dm

* Replaced /obj/item/weapon with /obj/item

* Fixes merge issues.

* Fix merge issues.

code/modules/modular_computers/file_system/programs/research/ai_restorer.dm

@@ -73,7 +73,7 @@
 		A.switch_from_dead_to_living_mob_list()
 		A.add_ai_verbs()
 		A.updateicon()
-		var/obj/item/weapon/aicard/AC = A.loc
+		var/obj/item/aicard/AC = A.loc
 		if(AC)
 			AC.update_icon()
 	// Finished restoring