Add world presence behaviour for 2.2 alpha3

[SimGamerJen]

Summary

Builds Alpha 3 on top of the validated Alpha 2 World Workers UI.

World Presence

• keeps workers in the native HumanGraphicsComponent NPC idle state
• adds subtle periodic facing variation around each worker's saved orientation
• smooths standing turns and feeds rotationVelocity into the native human conditional-animation path
• adds persistent FACE ME behaviour: the worker turns toward the local player and saves that as their new base facing
• adds hpWorld face [slot] and hpWorld idle [on|off] diagnostics

World UI refinement

• removes the redundant dedicated MOVE HERE action
• X now reads PLACE HERE for unplaced workers and MOVE HERE for already placed workers; the existing X callback already handled both cases
• A now performs FACE ME
• C remains REMOVE

Test focus

1. Confirm log contains Loaded 2.2.0.0-alpha3-presence-1.
2. Open WORLD and verify X changes between PLACE HERE and MOVE HERE based on selected worker state.
3. Place a worker, stand to one side, press A / click FACE ME and confirm the worker turns smoothly toward the player.
4. Move around and repeat FACE ME from different directions.
5. Leave workers standing for 30-60 seconds and confirm subtle idle orientation changes occur without translation.
6. Run hpWorld idle off and confirm workers return toward their saved facing and stop varying; hpWorld idle on resumes variation.
7. Reload the save and confirm FACE ME's saved base orientation is restored.

No walking, pathfinding, AI-job routing, or interaction system is introduced in this alpha.

[SimGamerJen]

Alpha 3 live test: FACE ME target/persistence works, but standing turn is visually jittery. Root cause investigation against GIANTS HumanGraphicsComponent shows graphicsRootNode yaw is externally owned while rotationVelocity is only a conditional-animation input. Added presence-2 hotfix to keep smooth world-facing interpolation on the graphics root and neutralize rotationVelocity immediately before HumanGraphicsComponent:update(), avoiding the root transform and turn-in-place animation fighting each other. Latest commit: 95651ad.

[SimGamerJen]

In-game Alpha 3 turn testing result: presence-3 restored jitter when combining model yaw with the turn-animation input. This confirms the lightweight HumanGraphicsComponent-only world-worker representation does not currently provide a stable natural turn-in-place path by simply driving yaw + rotationVelocity. Rolled back to a stable single root-yaw transform in b4fb72e and disabled automatic idle-facing variation by default to avoid repeated mannequin swivels. FACE ME remains as a controlled smooth-facing placeholder. Next architectural step should be a proper movement/graphics-state layer (PlayerMover/PlayerGraphicsState-style coordination), developed separately from the validated static placement/UI baseline.