Add host-configurable match settings persisted in settings

- GameSettings: 7 match fields (mode, hunter count, hide/seek/resolve
  durations, radar ping interval/lifetime) with authored defaults
- MatchSettingSlider (new): enum-driven panel binder, seeds from
  settings, saves on change; lifetime label shows one decimal
  (invariant culture)
- MatchManager: ApplyHostMatchSettings() on StartMatch (clamped);
  phase message now carries ping interval so clients tick correctly

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Assets/Scripts/Components/UI/MatchSettingSlider.cs.meta

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