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/modules/asset_cache/transports/asset_transport.dm

@@ -82,11 +82,15 @@
 /// asset_list - A list of asset filenames to be sent to the client. Can optionally be assoicated with the asset's asset_cache_item datum.
 /// Returns TRUE if any assets were sent.
 /datum/asset_transport/proc/send_assets(client/client, list/asset_list)
+#if defined(UNIT_TESTS)
+	return
+#endif
+
 	if (!istype(client))
 		if (ismob(client))
-			var/mob/M = client
-			if (M.client)
-				client = M.client
+			var/mob/our_mob = client
+			if (our_mob.client)
+				client = our_mob.client
 			else //no stacktrace because this will mainly happen because the client went away
 				return
 		else