Refactor CameraManager.ts: Modularize Camera and View Management

[snjsomnath]

Current Issues with CameraManager.ts (408 lines):

• Complex camera type switching and view management in a single file.
• Animation system is mixed with camera controls.
• Transition logic is tightly coupled with camera management.

Recommended Modularization Structure:

camera/
├── CameraManager.ts (main orchestrator)
├── types/
│   ├── PerspectiveCameraController.ts
│   └── OrthographicCameraController.ts
├── views/
│   ├── ViewManager.ts
│   └── ViewAnimator.ts
├── controls/
│   ├── OrbitControlsManager.ts
│   └── CameraTransitions.ts
└── utils/
    ├── cameraCalculations.ts
    └── viewHelpers.ts

Actionable Steps:

1. Extract camera type controllers into the types/ directory.
2. Move view management and animation into the views/ directory.
3. Separate controls and transition logic into the controls/ directory.
4. Move helper and calculation utilities into the utils/ directory.
5. Use CameraManager.ts as the main orchestrator that delegates responsibilities.
6. Gradually migrate logic from CameraManager.ts into these new modules for clarity and maintainability.