Refactors the list datatype to support composite lists. Adapts a lot of circuits to be able to properly use composite lists. Adds the dispenser shell (#61856)

Co-authored-by: Watermelon914 <3052169-Watermelon914@users.noreply.gitlab.com>
Co-authored-by: Colovorat <35225170+Colovorat@users.noreply.github.com>

code/modules/wiremod/components/variables/getter.dm

@@ -0,0 +1,22 @@
+/**
+ * # Getter Component
+ *
+ * Gets the current value from a variable.
+ */
+/obj/item/circuit_component/variable/getter
+	display_name = "Variable Getter"
+	desc = "A component that gets a variable globally on the circuit."
+
+	/// The value of the variable
+	var/datum/port/output/value
+
+	circuit_size = 0
+
+/obj/item/circuit_component/variable/getter/populate_ports()
+	value = add_output_port("Value", PORT_TYPE_ANY)
+
+/obj/item/circuit_component/variable/getter/pre_input_received(datum/port/input/port)
+	. = ..()
+	if(current_variable)
+		value.set_datatype(current_variable.datatype)
+		value.set_value(current_variable.value)

code/modules/wiremod/components/variables/setter.dm

@@ -0,0 +1,30 @@
+/**
+ * # Setter Component
+ *
+ * Stores the current input when triggered into a variable.
+ */
+/obj/item/circuit_component/variable/setter
+	display_name = "Variable Setter"
+	desc = "A component that sets a variable globally on the circuit."
+
+	circuit_flags = CIRCUIT_FLAG_INPUT_SIGNAL|CIRCUIT_FLAG_OUTPUT_SIGNAL
+
+	/// The input to store
+	var/datum/port/input/input_port
+
+	circuit_size = 0
+
+/obj/item/circuit_component/variable/setter/populate_ports()
+	input_port = add_input_port("Input", PORT_TYPE_ANY)
+	trigger_input = add_input_port("Store", PORT_TYPE_SIGNAL)
+
+/obj/item/circuit_component/variable/setter/pre_input_received(datum/port/input/port)
+	. = ..()
+	if(port == variable_name)
+		input_port.set_datatype(current_variable.datatype)
+
+/obj/item/circuit_component/variable/setter/input_received(datum/port/input/port)
+	if(!current_variable)
+		return
+	current_variable.set_value(input_port.value)
+