[Resonance] Quaternion fixes

[ITeMbI4]

Changes

• Make rotation optional for Pickup.Spawn, Pickup.CreateAndSpawn, Projectile.Spawn, Projectile.CreateAndSpawn and Ragdoll.CreateAndSpawn
• Fix zero Quaternion

[ITeMbI4]

A bit of context, why I delete default from Quaternion:

When you create a Quaternion with default value, it will be - new Quaternion(0f, 0f, 0f, 0f).
So, myRotation *= Quaternion.AngleAxis(90f, Vector3.up); will fail to rotate an object, because rotation is invalid.

So, I just change all zero Quaternion to a proper one - identity = new Quaternion(0f, 0f, 0f, 1f)

More in https://discussions.unity.com/t/why-are-quaternions-initialized-to-an-invalid-rotation-by-default/816397