Convert Harpy Singing Into a Trait (Simple-Station#714)

# Description
Adds a new trait that lets characters play midi without needing an
instrument.

Singer a 1-point positive trait. For now it's only available for vulps
and felinids as they are naturally more vocal than other species.

Also refactored harpy singing system a bit.

# TODO

- [X] Find out whatever causes this. Not critical, but probably should
be fixed...
<details><p>


![image](https://github.com/user-attachments/assets/8e0a6bf5-5fa3-4a0a-8937-2931dfe4ee62)

</p></details>

<details><summary><h1>Media</h1></summary>
<p>

Outdated


![image](https://github.com/user-attachments/assets/018b6cf3-d510-46e2-8c38-4bd49e1929bd)


![image](https://github.com/user-attachments/assets/f27bd451-b3c2-4a22-ab50-35c2f4ecbcb3)

</p>
</details>

# Changelog
:cl:
- add: Added a new positive trait - singer. It allows you to play midi
songs without an instrument, similarly to harpies.

---------

Signed-off-by: Mnemotechnican <[email protected]>
Co-authored-by: Danger Revolution! <[email protected]>
Co-authored-by: VMSolidus <[email protected]>

Resources/Locale/en-US/traits/traits.ftl

@@ -188,3 +188,5 @@ trait-description-WeaponsGeneralist =
     You are a jack of all trades with melee weapons, enabling you to be versatile with your weapon arsenal.
     Your melee damage bonus for all Brute damage types (Blunt, Slash, Piercing) becomes 25%.
 
+trait-name-Singer = Singer
+trait-description-Singer = You are naturally capable of singing simple melodies with your voice.

Resources/Prototypes/Traits/skills.yml

@@ -155,3 +155,16 @@
       inverted: true
       species:
         - Felinid
+
+- type: trait
+  id: Singer
+  category: Auditory
+  points: -1
+  requirements:
+    - !type:CharacterSpeciesRequirement
+      inverted: true
+      species:
+        - Harpy
+  components:
+    - type: Singer
+      proto: NormalSinger