Fixes greyscale colors not updating when changing their colors via VV, and fixes some issues with accessories (#77806)

## About The Pull Request

Fixes https://github.com/Skyrat-SS13/Skyrat-tg/issues/23214

This fixes a few bugs and cleans up code a bit:

1) Greyscale colors that were changed via the VV modify greyscale menu
will now update the mob's worn clothing accordingly. It wasn't doing
this before. Accessories in particular needed a bit of extra work to
update in this way because it wasn't coded with this case in mind.

2) Accessories will call `equipped()` and `dropped()` when they get
added/removed. This will fix issues like item flags being incorrectly
set, action bars not being added, etc.

3) Accessories will now be returned by `get_all_gear()`. This will
probably fix a few issues I'm not aware of.

## Why It's Good For The Game

<details><summary>Works</summary>


![dreamseeker_xijzQB0ALa](https://github.com/tgstation/tgstation/assets/13398309/eccb35d5-e1ea-4e2c-9906-f5b8c2187d24)

</details>

<details><summary>get_all_gear()</summary>


![dreamseeker_WsG0Uu2tIe](https://github.com/tgstation/tgstation/assets/13398309/d5c272d4-1990-454c-b48f-4da7b6a5f859)

</details>

<details><summary>get_equipped_items()</summary>


![dreamseeker_qe4hMngAO3](https://github.com/tgstation/tgstation/assets/13398309/06469b93-2a58-49db-be7f-c748576bf481)

</details>


<details><summary>item_flags get set now, hopefully preventing future
issues related to that</summary>


![image](https://github.com/tgstation/tgstation/assets/13398309/29a0e25a-a88f-4547-99f8-888da6b85e4d)

</details>

## Changelog

🆑
fix: greyscale colors will now update on the mob when modifying them via
the VV menu
/🆑

---------

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

code/modules/assembly/bomb.dm

@@ -122,7 +122,7 @@
 	if(LAZYLEN(assembly.assemblies) == igniter_count)
 		return
 
-	if((src in user.get_equipped_items(TRUE)) && !user.canUnEquip(src))
+	if((src in user.get_equipped_items(include_pockets = TRUE, include_accessories = TRUE)) && !user.canUnEquip(src))
 		to_chat(user, span_warning("[src] is stuck to you!"))
 		return