Update Quaternion

[ITeMbI4]

Description

Describe the changes

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

What is the current behavior? (You can also link to an open issue here)

What is the new behavior? (if this is a feature change)

Does this PR introduce a breaking change? (What changes might users need to make in their application due to this PR?)
Probably yes

Other information:
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

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentations

Submission checklist

• I have checked the project can be compiled
• I have tested my changes and it worked as expected

Patches (if there are any changes related to Harmony patches)

• I have checked no IL patching errors in the console

Other

• Still requires more testing