CPU Player Controller: RoboTito (Character 13)

**Subtask of #164**: Implement CPU player controller for RoboTito (Character 13).

**Character Details:**
- **Name**: RoboTito
- **Character ID**: 13
- **Type**: Robot character with vertical stretching ability
- **Special**: No jumping; stretches vertically to ceiling (press UP to latch, DOWN to release); fall damage immunity

**CPU Controller Requirements:**
- Implement AI decision-making for movement, attacks, and defense
- Character-specific behavior patterns and strategies
- Difficulty scaling (Easy/Medium/Hard)
- Proper collision detection and response
- Animation state management
- Special ability usage (vertical stretching)

**Implementation Notes:**
- Follow existing character attack patterns from CharacterAttacks.bas
- Integrate with existing movement and physics systems
- Ensure proper 4-player compatibility
- Test across all TV standards (NTSC/PAL/SECAM)
- Handle vertical stretching mechanics for CPU AI

**Dependencies:**
- Character-specific attack logic
- Movement system integration
- Animation system compatibility
- Collision detection system

**Acceptance Criteria:**
- CPU player behaves intelligently for RoboTito
- Proper difficulty scaling
- No conflicts with human players
- Maintains 60fps performance
- Correctly uses vertical stretching ability