[MDB Ignore] Combines Cargobus consoles with Dept. Order Consoles, freeing all departments of 1 whole tile of space (#82210)

## About The Pull Request

- Departmental orders are now an NTOS app
   - To download, they require `ACCESS_COMMAND`.
   - To use, they require one access from the department.
- This means you cannot order things from not-your-department unless you
have an ID.
- When newly downloading the app, it will prompt a head of staff to
insert an ID, to determine which department to be linked to.

- Changes chat room overlay from the kind that AI uploads use to a new
icon.

- Minor refactors to department order in general. 


![image](https://github.com/tgstation/tgstation/assets/51863163/605c2499-e5e9-4f91-aa2a-aa8af8b05a9f)


![image-1](https://github.com/tgstation/tgstation/assets/51863163/089d3fe1-787c-4f5a-bc3d-edb9611dfbb2)

## Why It's Good For The Game

These two computers are surprising waste spacers for two things which
are tied together.
So why not combine them?

The lesser used cargobus chat is still there, and departmental orders
are front and center.

This gives mappers a ton more leeway when mapping departments out and is
overall less clutter.

## Changelog

🆑 Melbert
qol: Cargobus chat console and Departmental Order console are now
combined into one.
qol: Mod PCs active on the "chat client" apps no longer look like AI
uploads (and now have their own sprite)
refactor: Departmental order consoles were refactored a bit, report any
oddities.
/🆑

code/modules/modular_computers/file_system/programs/chatroom/ntnrc_client.dm

@@ -8,13 +8,13 @@
 	filename = "ntnrc_client"
 	filedesc = "Chat Client"
 	downloader_category = PROGRAM_CATEGORY_DEVICE
-	program_open_overlay = "command"
-	extended_desc = "This program allows communication over NTNRC network"
+	program_open_overlay = "text"
+	extended_desc = "This program allows communication over NTNRC network."
 	size = 8
 	ui_header = "ntnrc_idle.gif"
 	program_flags = PROGRAM_ON_NTNET_STORE | PROGRAM_REQUIRES_NTNET
 	tgui_id = "NtosNetChat"
-	program_icon = "comment-alt"
+	program_icon = FA_ICON_COMMENT_ALT
 	alert_able = TRUE
 
 	///The user's screen name.