Add momentum-aware movement optimization for chefBot

[kevinmaes]

Parent Issue: #180

Objective

Leverage chef physics (accel=1, decel=7) more intelligently for smoother, more efficient movement.

Current Problem

The bot doesn't fully account for:

• Asymmetric acceleration/deceleration
• Benefits of maintaining current direction
• Coasting opportunities vs hard-braking

Proposed Solution

1. Direction momentum bonus: Increase score for eggs in current movement direction
2. Pre-positioning: Move toward anticipated cluster centers early
3. Coast-to-position: Use deceleration distance intelligently instead of overshooting and correcting

Implementation Details

1. Add calculateOptimalApproach() in tests/machines/helpers.ts
2. Consider current speed and direction in scoring
3. Add bonus for eggs requiring no direction change: +0.3 * (currentSpeed / speedLimit)
4. Calculate deceleration zones and prefer natural stopping points

Impact

• Smoother movement patterns
• Better catch rates through optimal positioning
• Fewer wasted frames on direction changes

Success Metrics

• Reduced direction changes per game
• Improved catch efficiency (catches per distance traveled)