[Crazy RoboTaxi] Improve Crazy Robotaxi controller handling

[aidanfnv]

Split off from #553, this change modifies the controller handling to make the game feel better on a controller, such as by restoring analog steering. Previously, to make steering more responsive, it was apparently changed to be digital.

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[greptile-apps]

Confidence Score: 5/5

The current PR appears safe to merge; no actionable new failures were introduced since the previous review.

Summary

This PR improves Crazy RoboTaxi controller handling while preserving keyboard support.

• Restores proportional gamepad steering and pedal input with rescaled dead zones.
• Unifies keyboard and gamepad commands around the shared arcade-driving command shape.
• Rate-limits direct steering to retain responsive but smooth vehicle behavior.
• Allows the most recent deliberate keyboard or controller input to select the active source.
• Adds focused control, gameplay, and engine-input tests for the updated behavior.

Diagram

%%{init: {'theme': 'neutral'}}%%
flowchart LR
  K[Keyboard event] --> KC[Keyboard DriverCommand]
  G[Gamepad state] --> DZ[Rescaled dead zones]
  DZ --> GC[Gamepad DriverCommand]
  W[Wheel state] --> WC[Wheel DriverCommand]
  KC --> A[Most recent deliberate input arbitration]
  GC --> A
  WC --> A
  A --> C[Active DriverCommand]
  C --> D[Taxi dynamics]
  D --> S[Rate-limited steering target]

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_{Reviews (10) · Last reviewed commit: "Improve Crazy Robotaxi controller handli..."}

[aidanfnv]

/ok to test edcfb83

[aidanfnv]

/ok to test fabbef9

[spaingnv]

LGTM. New tests cover command shape, dead zones, and keyboard vs pad ownership.

[spaingnv]

/ok to test 7acfe94