Add Unity port of AI for Oceans

[MohammadHamidi]

Complete migration of the JavaScript/React web app to Unity engine:

Core Systems:

• GameManager singleton for state management
• SceneController for mode/scene transitions
• Event-driven architecture for UI updates

Classification System:

• NaiveKNNClassifier replacing TensorFlow KNN
• NaiveSVMClassifier for word modes
• Simple attribute-based classification (no ML dependencies)

Fish Generation:

• Procedural fish generation with 19 bodies, 18 eyes, 15 mouths
• Color tinting system for sprite components
• FishRenderer for sprite assembly

Animation:

• FishAnimator with bobbing (sine wave) motion
• S-curve easing for scanning pauses
• Smooth scene transitions

UI Components:

• TrainingUI with Yes/No buttons
• PredictionUI with colored confidence frames
• PondUI for results visualization
• WordSelectionUI for short/long modes
• GuideUI with typing text effect
• MainMenuUI for mode selection
• ConfirmationDialog component
• AIBot with expression states

Audio:

• SoundManager with category-based playback
• Support for yes/no/sort sounds

All 5 game modes supported:

• Fish vs Trash
• Creatures vs Trash Demo
• Creatures vs Trash
• Short (6 adjectives)
• Long (15 adjectives)

Assets copied from original project to Unity sprite/audio folders.