weapon system rework

scripts/weapon_system/weapon_state.gd

@@ -0,0 +1,17 @@
+@abstract
+extends State
+
+class_name WeaponState
+
+var machine: WeaponSubStateMachine
+
+func use_begin() -> void:
+	pass
+func use_end() -> void:
+	pass
+func alternate_state() -> void:
+	pass
+# Need to clarify naming; Switch mode like firemode. For different states use
+# alternate_state
+func switch_mode() -> void:
+	pass