[Feature] Camera Systems: Orbit and Fly Cameras with Input Controllers

[vmarcella]

Overview

Add reusable camera systems and input-driven controllers to simplify 3D scene navigation and interaction.

Scope

• Orbit Camera: Rotates around a focal point with configurable distance, pitch/yaw limits, and zoom
• Fly Camera: Free-moving camera with position and orientation (first-person style)
• Camera Controller Trait: Abstraction for input handling, enabling custom controller implementations
• Built-in Controllers: Keyboard/mouse controllers for both camera types

Motivation

Currently, camera logic must be manually implemented per-application. Providing standard camera types and controllers reduces boilerplate and enables rapid prototyping of 3D scenes.

Acceptance Criteria

• OrbitCamera with target, distance, and rotation constraints
• FlyCamera with position and orientation
• CameraController trait for input abstraction
• Mouse/keyboard controller implementations
• Example demonstrating both camera types