[Ban AI] Add project setting

Context

This is part of a larger epic that gives admins more control over where AI is allowed in their organization.

Scope of this issue

• Adds an additional setting in Project > Settings > General > Visibility, project features, permissions

Designs

⚠ Final designs and UI copy in Figma ⚠

Img	Desc
	Setting
	Setting can be in a disabled state if parent has disabled AI features, tooltip upon click on 🔒 icon