[Crazy RoboTaxi] Add settings menus with persistent settings configs

[aidanfnv]

Closes #551
Closes #552

Split off from #553, this change adds the ability to load settings from file instead of relying on CLI.
The game loads each setting from a file, and falls back to defaults if not present in the file.
CLI args and flags act as overrides for those loaded values.

It also adds an options menu to the game for modifying and saving the file contents, with the option to restore defaults.

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[greptile-apps]

Confidence Score: 5/5

The PR appears safe to merge, with no outstanding previous findings or new blocking issues.

Summary

Adds persistent YAML settings and an Options menu for Crazy Robotaxi.

• Loads sparse user configuration over runner defaults, with explicit CLI overrides kept separate from saved values.
• Supports validated, atomic saves, reset-to-defaults, immediate presentation updates, and restart notices for other settings.
• Normalizes live-edit dependencies and preserves terminal results when gameplay HUD overlays are hidden.
• No new actionable issues were identified in the changes since the previous review. Tests were inspected but not executed.

Diagram

%%{init: {'theme': 'neutral'}}%%
flowchart TD
  A[Runner defaults] --> B[Load sparse user YAML]
  B --> C[Saved settings]
  C --> D[Apply explicit CLI overrides]
  D --> E[Normalize dependencies]
  E --> F[Configure application]
  C --> G[Options draft]
  G --> H{Save or discard}
  H -->|Save| I[Normalize and validate]
  I --> J[Atomically update YAML]
  J --> K[Apply presentation settings]
  J --> L[Show restart notice when needed]
  H -->|Discard| M[Return without changes]

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_{Reviews (8) · Last reviewed commit: "[crazy-robotaxi] Isolate Options UI mode..."}

[aidanfnv]

/ok to test d89f461

[aidanfnv]

/ok to test 2b52fee