What does this PR do?

This PR significantly expands the window system with new window types, animated open/close behavior, manual open controls, shape-specific settings, and improved first-person interaction.

It enables:

• Multiple window types
• Smooth animated open/close interactions
• Manual open-state sliders for operable windows
• Rounded and arched shape support where appropriate
• First-person interaction for operable windows
• Cleaner separation between authored window state and runtime animation

Window Types

• Added window types:
  • Fixed
  • Sliding
  • Casement
  • Awning
  • Single-hung
  • Double-hung
  • Bay
  • Bow
  • Louvered

Window Behavior

• Sliding windows:
  • One panel slides open and closed
  • Supports animated and manually controlled open state
  • Corner shape option is hidden
• Casement windows:
  • Supports single casement and double/french-style casement
  • Supports corner shape options
  • Fixes curved panel behavior with large corner radius
• Awning windows:
  • Opens upward
  • Supports corner shape options
  • Shares behavior with hopper through direction setting
• Hopper behavior:
  • Merged into awning using an open direction setting
  • Opens downward when direction is set to down
  • Supports corner shape options
• Single-hung and double-hung windows:
  • Animate open/close smoothly
  • Corner shape is restricted to rectangle
• Louvered windows:
  • Slats animate open/close smoothly
  • Corner shape support was fixed
• Bay and bow windows:
  • Corner shape options are hidden
  • Sill is disabled by default
  • Bay top and bottom slabs were fixed
  • Bow uses a smoother curved path
  • Bow top and bottom slabs follow the curved shape

Window Settings

• Added window type selection in the window settings panel
• Updated side menu type list to match the door-style vertical list
• Added manual open slider support for:
  • Sliding
  • Casement
  • Awning
  • Hopper/downward awning
  • Single-hung
  • Double-hung
  • Louvered
• Rounded shape disables sill by default
• Bay and bow disable sill by default
• Hidden unsupported corner shape options for:
  • Sliding
  • Single-hung
  • Double-hung
  • Bay
  • Bow

Animation & Interaction

• Added animated open/close behavior:
  • R key toggles supported operable windows
  • Open slider stays in sync with toggle
  • Uses smooth tweened animation instead of instant jumps
• Optimized direct animation paths for smoother behavior:
  • Sliding windows
  • Single-hung windows
  • Double-hung windows
  • Louvered windows
• Extracted shared viewer window layout helpers so static mesh generation and animation use the same positioning math

First-Person View (FPV)

• Window interactions now work in FPV
• Operable windows can be toggled from first-person mode
• FPV interaction supports animated open/close behavior
• FPV interaction uses the same runtime window open state as the editor controls

Architecture Improvements

• Window nodes store authored final state
• Runtime animation state is transient and kept in interactive state
• Added a viewer-layer window animation system
• Added window animation completion events
• Shared window layout helpers live in viewer
• Renderer and animation system use unified open-state mapping
• Editor-only settings, tools, and FPV behavior remain inside the editor layer