added sperate camera support

[mistergiantmedia]

New Feature: Generate Separate Cameras

• Added "Generate Separate Cameras" button under Quilt Setup & Rendering
• Creates individual cameras for each quilt view position
• Perfect for render farm distribution and After Effects compositing
• Each camera includes metadata for quilt assembly

Changes Made

• Modified ui.py: Added button and status display
• Modified lightfield_render.py: Added camera generation operator
• Modified init.py: Added operator registration

[mistergiantmedia]

now with DOF / F-Stop