Add procedural elevator system with floorplan, runtime, and first-person support

[sudhir9297]

What does this PR do?

This PR introduces a complete procedural elevator system across core, editor, viewer, floorplan, and first-person workflows.

It enables:

• Fully configurable procedural elevators
• Physical 3D shaft/cab rendering with animated runtime behavior
• Integrated floorplan rendering and editing
• Automatic slab/ceiling cutout generation
• Elevator dispatching, floor servicing, and queue handling
• First-person elevator interaction and movement support
• Improved editor architecture and live-preview editing workflows

---

Elevator Core System

• Added new ElevatorNode schema with support for:
  • Cab size
  • Shaft size
  • Wall thickness
  • Shaft style
  • Door style
  • Door panel style
  • Service range
  • Disabled floors
  • Service-only floors
  • Elevator speed
  • Door timing
  • Dwell timing

---

Elevator Tools & Editor Integration

• Added elevator creation and move tools.

• Integrated elevators into:

  • Structure tools
  • Command palette
  • Contextual tools
  • Selection manager
  • Tree panel
  • Side panel

• Added full elevator side panel controls:

  • Position / rotation
  • Cab dimensions
  • Shaft dimensions
  • Shaft style
  • Door styles
  • Door panel types
  • Door size
  • Service floors
  • Default floor
  • Disabled/service-only floors
  • Destinations
  • Speed
  • Door timing
  • Dwell timing

---

Live Editing & Performance

• Added live preview editing:
  • Position
  • Rotation
  • Dimensions
• Updates render immediately while editing.
• Scene store commits only on final commit/release.
• Added live transform/live override store support for improved editing performance.

---

Elevator Rendering

• Added physical 3D elevator rendering:
  • Shaft
  • Cab
  • Solid/glass shaft styles
  • Cab walls
  • Landing door frames
  • Cab doors
  • Call panels
  • Physical mesh buttons
  • Floor indicators

---

Door Styles & Cab Controls

• Added door opening styles:

  • Center-opening
  • Single-left
  • Single-right

• Added door panel styles:

  • Glass-frame
  • Solid-panel
  • Segmented-panel

• Added inside-cab controls:

  • Destination buttons
  • Door-open button

• Added landing call buttons outside elevator doors.

---

Runtime & Dispatch System

• Added elevator runtime state:

  • Current floor
  • Target floor
  • Queue
  • Car Y position
  • Door openness
  • Animation phase

• Added elevator movement system:

  • Speed handling
  • Door timing
  • Dwell timing
  • Queued destinations
  • Arrival/open-close behavior
  • Active/queued button states

• Added shared dispatch system for multiple elevators:

  • Chooses best eligible elevator for landing calls

---

Floor Restrictions & Indicators

• Added support for:

  • Disabled floors
  • Service-only floors

• Applied restrictions across:

  • Dispatch
  • Side panel
  • Cab buttons
  • Landing calls
  • Floorplan markers

• Added floor indicators:

  • Above landing doors
  • Inside cab
  • Shows:
    • Current floor
    • Target floor
    • Travel direction

• Fixed mirrored floor numbers and inverted direction arrows.

---

Slab & Ceiling Cutouts

• Added automatic slab and ceiling cutouts for elevator shafts.

• Cutouts generated from:

  • Shaft footprint
  • Elevator service range

• Added:

  • Polygon union helpers
  • Shared surface hole merging

• Allows multiple cutouts to merge cleanly.

---

First-Person Support

• Added first-person elevator interaction:

  • Button targeting
  • Cab and landing colliders
  • Closed-door blocking
  • Door-open entry behavior

• Added player locking:

  • Player remains attached to moving elevator cab

---

Floorplan Support

• Added elevator rendering in floorplan:

  • Shaft footprint
  • Cab footprint
  • Door opening side
  • Call station marker
  • Current/target/queued markers
  • Selection/hover/delete states
  • Glass/solid shaft styling

• Added floorplan interactions:

  • Drag support
  • Resize handles
  • Hit testing
  • Marquee selection

• Added served-range visualization:

  • Ordered stop markers
  • Disabled/service-only floors
  • Current floor
  • Target floor
  • Queued floors

---

Architecture Improvements

• Refactored elevator architecture:
  • Opening sync logic moved into core
  • Renderer kept presentation-only
  • Viewer interactions moved into dedicated system
  • Editor tools no longer import viewer state directly

---

Related Structural & Viewer Updates

• Expanded procedural column support:

  • Support styles
  • Presets/defaults
  • Richer rendering
  • Better placement/hit testing

• Updated related systems for:

  • Ceilings
  • Slabs
  • Fences
  • Ground occluder
  • Node renderer registration
  • Post-processing

• Ensured compatibility with elevator cutouts and rendering behavior.

---

Commit Highlights

• Add procedural support column variants
• Add column hit testing and align column defaults
• Optimize elevator editing performance with live previews
• Add cab door-open control and align elevator buttons
• Add elevator floorplan overlay
• Improve elevator floorplan resize and drag controls
• Refactor elevator systems across core, viewer, and editor
• Fix mirrored elevator indicators and arrows