Snake Scarves! (#2511)

## About The Pull Request
Lets you scoop up snakes and wear them around your neck like a scarf.
## Why It's Good For The Game
It was always kind of dumb that you couldn't pick up snakes, plus you
get to wear them as a neat accessory now.
## Proof Of Testing
See the video below.
<details>
<summary>Screenshots/Videos</summary>


https://github.com/user-attachments/assets/b2f7ed66-df5f-44e6-af7a-830a478840d1

</details>

## Changelog
🆑
add: you can now pick up snakes and wear them as a scarf
/🆑

modular_zubbers/code/modules/snakes/snakes.dm

@@ -0,0 +1,4 @@
+/mob/living/basic/snake
+	can_be_held = TRUE
+	worn_slot_flags = ITEM_SLOT_NECK
+	head_icon = 'modular_zubbers/code/modules/snakes/snakes.dmi'

tgstation.dme

@@ -9259,6 +9259,7 @@
 #include "modular_zubbers\code\modules\silicons\borgs\code\robot_model.dm"
 #include "modular_zubbers\code\modules\silicons\borgs\code\robot_upgrade.dm"
 #include "modular_zubbers\code\modules\skub\skub.dm"
+#include "modular_zubbers\code\modules\snakes\snakes.dm"
 #include "modular_zubbers\code\modules\space_background\parallax.dm"
 #include "modular_zubbers\code\modules\space_background\turf_space.dm"
 #include "modular_zubbers\code\modules\spells\banhammer_item.dm"