Add Audio to Weapons

[AfterMath24]

I need to make audio events for the follow:

1. Per Shot Sound
2. Per Projectile Sound
3. No Ammo Sound

Chance then will need to supply audio files for the weapons to use.

[AfterMath24]

Added in UnityEvent invocations for the following weapon events:

1. Equip
2. Unequip
3. FireShot
4. ProjectileFire
5. NoAmmo

We can use this to call a single AudioSource and run the function PlayOneShot. This allows a audio file to be selected to play from the given AudioSource when the event is invoked.

[AfterMath24]

When designing weapons it is up to the weapon designer to implement audio attached to the appropriate event.