Add: Otter Snout & Otter Tail (#5362) (#4278)

Add otter snout and waggable otter tail to character customization

(cherry picked from commit 5ee318ddcf382fe12013c5c0a9522398d26abcb3)
## About The Pull Request

Just porting otter snout and tail from Nova
## Why It's Good For The Game

Basic additional customization options for characters

## Proof Of Testing

<details>
<img width="246" height="241" alt="image"
src="https://github.com/user-attachments/assets/f8f2d1f2-6b75-48a9-a39c-0ede0f415fba"
/>

<img width="618" height="146" alt="image"
src="https://github.com/user-attachments/assets/8cc8ecf7-2b25-49ab-81b7-b06b6d065c87"
/>

<img width="363" height="254" alt="image"
src="https://github.com/user-attachments/assets/e514add9-ba5e-4a0b-88ee-6985b645cadb"
/>


</details>

## Changelog
🆑
add: otter snout and waggable otter tail from Nova
🆑

---------

Co-authored-by: Dani Glore <fantasticdragons@gmail.com>

modular_skyrat/modules/customization/modules/mob/dead/new_player/sprite_accessories/snout.dm

@@ -196,6 +196,10 @@
 	name = "Otie Smile"
 	icon_state = "otiesmile"
 
+/datum/sprite_accessory/snouts/mammal/otter
+	name = "Otter"
+	icon_state = "otter"
+
 /*/datum/sprite_accessory/snouts/mammal/round
 	name = "Mammal Round"
 	icon_state = "round"

modular_skyrat/modules/customization/modules/mob/dead/new_player/sprite_accessories/tails.dm

@@ -272,6 +272,10 @@
 	name = "Otusian"
 	icon_state = "otie"
 
+/datum/sprite_accessory/tails/mammal/wagging/otter
+	name = "Otter"
+	icon_state = "otter"
+
 /datum/sprite_accessory/tails/mammal/wagging/plug
 	name = "Plug"
 	icon_state = "plugtail"