Adds the Orion theme and a couple of small changes to the cargo programs (#22655)

The orion theme has arrived! This theme is intentionally not using the
orion colors, as I couldn't get them to look good and I found this theme
to feel better for the warehouse aesthetic.
Other changes include:
- It is now possible to clear the currently selected/viewed order in the
cargo control and cargo delivery programs.
- The cargo delivery program was fixed to not crash if you clicked
overview or pay before selecting an order
- It is now possible to pick a theme for the program selection screen
(see last image) for modular computers. This is currently only used for
the operations delivery tablets.
- The cargo delivery program can print invoices, if the modular computer
has a nanoprinter. One was given to the delivery tablet in the HT
locker.

<img width="800" height="800" alt="image"
src="https://github.com/user-attachments/assets/4f2de8dd-9e94-4898-9907-c97a53084771"
/>
<img width="800" height="800" alt="image"
src="https://github.com/user-attachments/assets/afc841ca-a257-4cd0-9d9d-654ba6abe8f6"
/>
<img width="800" height="800" alt="image"
src="https://github.com/user-attachments/assets/7d2e757e-79fb-4100-a373-9a378d18d6ec"
/>
<img width="1200" height="800" alt="image"
src="https://github.com/user-attachments/assets/bc2da18b-1a5c-463e-a63c-a79b10de20b0"
/>
<img width="1200" height="800" alt="image"
src="https://github.com/user-attachments/assets/441e3479-71b0-4898-a5f0-14f6441ebf97"
/>
<img width="575" height="700" alt="image"
src="https://github.com/user-attachments/assets/25e95e1a-3b1d-4a5b-bc8f-dc01ba07c107"
/>
<img width="620" height="800" alt="image"
src="https://github.com/user-attachments/assets/f68f6954-f077-40c7-b57d-d65e16b897ae"
/>
<img width="575" height="700" alt="image"
src="https://github.com/user-attachments/assets/879d97d3-e5ed-499b-9e15-5459e16ee38e"
/>
<img width="400" height="500" alt="image"
src="https://github.com/user-attachments/assets/ae7b4123-b556-438e-8d55-a826611f00bf"
/>

---------

Co-authored-by: Batrachophreno <batrochophreno@gmail.com>

code/modules/modular_computers/computers/modular_computer/ui.dm

@@ -41,7 +41,7 @@
 	data["PC_showbatteryicon"] = !!battery_module
 	data["PC_batterypercent"] = battery_module ? "[round(battery_module.battery.percent())] %" : null
 	data["PC_apclinkicon"] = (tesla_link?.enabled && apc_powered) ? "charging.gif" : ""
-	data["PC_device_theme"] = active_program ? active_program.tgui_theme : "scc"
+	data["PC_device_theme"] = active_program ? active_program.tgui_theme : device_theme
 	data["PC_ntneticon"] = get_ntnet_status_icon()
 	data["PC_stationtime"] = worldtime2text()
 	data["PC_stationdate"] = "[time2text(world.realtime, "DDD, Month DD")], [GLOB.game_year]"

code/modules/modular_computers/computers/modular_computer/variables.dm

@@ -79,6 +79,10 @@
 	var/screensaver_light_range = 0
 	var/screensaver_light_color
 	var/menu_light_color
+
+	/// Default theme if the program doesn't set it
+	var/device_theme = "scc"
+
 	/// Adds onto the output_message proc's range
 	var/message_output_range = 0
 	/// Maximal hardware size. Currently, tablets have 1, laptops 2 and consoles 3. Limits what hardware types can be installed.

code/modules/modular_computers/computers/subtypes/preset_handheld.dm

@@ -83,6 +83,11 @@
 // Cargo Delivery
 /obj/item/modular_computer/handheld/preset/supply/cargo_delivery
 	_app_preset_type = /datum/modular_computer_app_presets/cargo_delivery
+	device_theme = "orion"
+
+/obj/item/modular_computer/handheld/preset/supply/cargo_delivery/install_default_hardware()
+	. = ..()
+	nano_printer = new /obj/item/computer_hardware/nano_printer(src)
 
 // Medical