Camera eyes have been lightly refactored (among other things...) (#87805)

## About The Pull Request

* A generic /mob/eye/camera type has been made, containing everything
needed to interface with a cameranet
* /mob/eye/ai_eye has been refactored into a generic /mob/eye/camera
instance
* Advanced cameras no longer inherit from AI eyes, splitting off
behaviour
* Camera code has been somewhat cleaned up
* Probably some more stuff I'm forgetting right now

## Big man Southport:

![image](https://github.com/user-attachments/assets/de6e6ff0-ca99-4636-bdec-5e0b2d6b8037)

## Changelog

🆑
code: made /proc/getviewsize() pure

refactor: mob/eye/ai_eye has been restructured, now inheriting from a
generic mob/eye/camera type
refactor: advanced cameras and their subtypes are now
mob/eye/camera/remote subtypes
code: the cameranet no longer expects the user to be an AI eye
code: remote camera eyes have had their initialization streamlined
code: remote cameras handle assigning and unassigning users by
themselves now
code: remote cameras now use weakrefs instead of hard referencing owners
and origins
code: also the sentient disease is_define was removed (we don't have
those anymore)
fix: AI eyes no longer assign real names to themselves, fixing their
orbit name
/🆑

---------

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

code/modules/forensics/_forensics.dm

@@ -112,7 +112,7 @@
 		if(!iseyemob(suspect))
 			return
 		if(isaicamera(suspect))
-			var/mob/eye/ai_eye/ai_camera = suspect
+			var/mob/eye/camera/ai/ai_camera = suspect
 			if(!ai_camera.ai)
 				return
 			suspect = ai_camera.ai
@@ -193,7 +193,7 @@
 		if(!iseyemob(suspect))
 			return
 		if(isaicamera(suspect))
-			var/mob/eye/ai_eye/ai_camera = suspect
+			var/mob/eye/camera/ai/ai_camera = suspect
 			if(!ai_camera.ai)
 				return
 			suspect = ai_camera.ai