…le saccade improvements (local)

- eyes naturally cycle between nearby player's eyes and mouth with physiological timing, micro-saccade jitter, near-field adaptation, and smooth fallback to idle saccades when no one is nearby
- targets are ranked by who's facing us, who we're facing, and proximity with hysteresis, reaction delay, and personality-driven tuning (will expose via BasisAvatar)
- `BasisGazeTarget.cs` which attaches to any GameObject to attract eye gaze (mirrors, cameras, signage, or anything). Supports transform tracking or manually driven focus points. It's scored alongside players automatically

- Mirrors compute a reflected eye position so the player naturally looks at their own reflection.
- Camera prefabs (handheld and remote pip) get gaze targets so the player glances toward the lens.

…isAvatar

Allows avatar creators to config eye gaze personality per-avatar via two
new sliders. Values are piped to `BasisLocalEyeDriver` on avatar load / swap, with live preview support during play mode for real-time tuning in the editor.

… eye gaze system

Pass head rotation delta into the eye job so movements compensate for head turns  (TIL way too much about the vestibulo-ocular reflex).

Also:
- General tuning pass to make things feel better.
- Debug window now uses a final value from the system itself.
- Various commenting clean-up for clarity.

- Widen all attentiveness ranges
- Add gaze disengagement timer: low attentiveness periodically averts eyes even when the target is valid
- Make reaction delay personality-driven instead of hardcoded instead of applying full personality immediately)