[MIRROR] Integrated circuits for modular computers (#26196)

Integrated circuits for modular computers (#80530)

This PR integrates circuits for modular computers and a good bits of
their programs.
The peculiarity here is that modular computers have no fixed amount of
unremovable components (except the base one with just a couple ports for
now), instead, they're added and removed along with programs. With a few
exceptions (such as the messenger and signaler), for these program
circuits to work, their associated program has to be either open or in
the background.

For a reason or another, not all programs have a circuit associated to
them, still, however the programs with a circuit are still a handful.
They are:
- Nanotrasen Pay System
- Notepad
- SiliConnect
- WireCarp
- MODsuit Control
- Spectre Meter
- Direct Messenger*
- LifeConnect
- Custodial Locator
- Fission360
- Camera
- Status Display
- SignalCommander

*By the by, sending messages has a cooldown, so it shouldn't be as
spammy. If it turns out to not be enough, I can make it so messages from
circuit will be ignored by other messenger circuits.

The PR is no longer WIP.

I believe modular computers could make for some interesting setups with
circuits, since they're fairly flexible and stocked with features unlike
many other appliances, therefore also a speck more abusable, though
limits, cooldowns, logging and sanitization have been implemented to
keep it in check.

🆑
add: Modular Computers now support integrated circuits. What can be done
with them depends on the programs installed and whether they're running
(open or background).
add: Modular Consoles (the machinery) now have a small backup cell they
draw power from if the power goes out.
/🆑

Co-authored-by: Ghom <42542238+Ghommie@users.noreply.github.com>

code/modules/modular_computers/computers/item/processor.dm

@@ -7,7 +7,8 @@
 	icon_state = null
 	icon_state_unpowered = null
 	icon_state_menu = null
-	hardware_flag = 0
+	hardware_flag = NONE
+	internal_cell = /obj/item/stock_parts/cell/crap
 
 	///The modular computer MACHINE that hosts us.
 	var/obj/machinery/modular_computer/machinery_computer
@@ -25,7 +26,6 @@
 	physical = loc
 	machinery_computer = loc
 	machinery_computer.cpu = src
-	internal_cell = machinery_computer.internal_cell
 	hardware_flag = machinery_computer.hardware_flag
 	steel_sheet_cost = machinery_computer.steel_sheet_cost
 	max_idle_programs = machinery_computer.max_idle_programs
@@ -44,12 +44,12 @@
 	machinery_computer = null
 	return ..()
 
-/obj/item/modular_computer/processor/use_power(amount = 0)
+/obj/item/modular_computer/processor/use_power(amount = 0, check_programs = TRUE)
 	var/obj/machinery/machine_holder = physical
 	if(machine_holder.powered())
 		machine_holder.use_power(amount)
 		return TRUE
-	return FALSE
+	return ..()
 
 /obj/item/modular_computer/processor/relay_qdel()
 	qdel(machinery_computer)