RPG Loot: Revisited & READY (#82533)

## About The Pull Request
Revival of #72881

A new alt click window with a tarkov-y loading spinner. Replaces the
object item window in stat panel.

## Videos
<details>
<summary>vids</summary>

toggleable grouping:

![syAA5zf6RK](https://github.com/tgstation/tgstation/assets/42397676/c89b372d-29f6-4ebe-895d-f73bbdc41c19)

now lists the floor as first obj:

![abc](https://github.com/tgstation/tgstation/assets/42397676/cd8dc962-2ac7-41bf-a5d3-b9e926116b06)

in action:

![dreamseeker_IkrPKt2QZt](https://github.com/tgstation/tgstation/assets/42397676/1f990aa0-60f0-47e7-9d93-b63e35d05273)

</details>

## features:
- search by name
- 515 image generator is much faster than alt click menu
- opening a gargantuan amount of items shouldnt freeze your screen
- groups similar items together in stacks by default, toggleable
- shows tile as first item
- <kbd>Shift</kbd> and <kbd>Ctrl</kbd> compatible with LMB
🖱️
- RMB points points at items (sry i could not get MMB working)
- key <kbd>Esc</kbd> to exit the window.


For devs:
- A new image generation tech.
- An error refetch mechanic to the Image component
- It does not "smart track" the items being added to the pile, just
reopen or refresh. This was a design decision.

## Why It's Good For The Game
Honestly I just dislike the stat panel

Fixes #53824

Fixes 

![image](https://github.com/tgstation/tgstation/assets/42397676/0e50faab-7d4d-4bf7-8c5b-4ac28547bfbd)

## Changelog
🆑
add: Added a loot window for alt-clicking tiles.
del: Removed the item browser from the stat panel.
/🆑

---------

Co-authored-by: Zephyr <12817816+ZephyrTFA@users.noreply.github.com>
Co-authored-by: AnturK <AnturK@users.noreply.github.com>
Co-authored-by: LemonInTheDark <58055496+LemonInTheDark@users.noreply.github.com>

code/controllers/subsystem/processing/obj_tab_items.dm

@@ -1,24 +0,0 @@
-PROCESSING_SUBSYSTEM_DEF(obj_tab_items)
-	name = "Obj Tab Items"
-	flags = SS_NO_INIT
-	runlevels = RUNLEVEL_LOBBY | RUNLEVELS_DEFAULT
-	wait = 0.1 SECONDS
-
-// I know this is mostly copypasta, but I want to change the processing logic
-// Sorry bestie :(
-/datum/controller/subsystem/processing/obj_tab_items/fire(resumed = FALSE)
-	if (!resumed)
-		currentrun = processing.Copy()
-	//cache for sanic speed (lists are references anyways)
-	var/list/current_run = currentrun
-
-	while(current_run.len)
-		var/datum/thing = current_run[current_run.len]
-		if(QDELETED(thing))
-			processing -= thing
-		else if(thing.process(wait * 0.1) == PROCESS_KILL)
-			// fully stop so that a future START_PROCESSING will work
-			STOP_PROCESSING(src, thing)
-		if (MC_TICK_CHECK)
-			return
-		current_run.len--