Add support for skin-specific VFX replacements to the R2API.Skins submodule.

[pseudopulse]

Adds the SkinVFX class to R2API.Skins. Provides an easy helper method for automatically replacing VFX depending on the equipped skin.

Supports replacing VFX for:

• EffectManager.SimpleMuzzleFlash
• BasicMeleeAttack swingEffectPrefab
• BulletAttack tracerEffectPrefab
• GenericDamageOrb's orb effect
• Any other spawned VFX if the source passes in the Identifier manually.

Provides the AddSkinVFX method, which takes in a SkinDef to require, any of (EffectIndex | string | GameObject), and either a replacement gameobject or a delegate to call upon the effect being spawned.

[CLAassistant]

All committers have signed the CLA.

[Nebby1999]

Please Bump the minor version of the Skin submodule on the thunderstore.toml file

That'll allow the funny githubb action to release it automatically

[xiaoxiao921]

Thanks for the contribution!