[feat]: GPU-based 3D grid deformation using De Jong attractor

[ArtemLazarchuk]

Overview

This PR introduces a new GPU-driven 3D grid deformation system based on a De Jong attractor flow field.
The visualization has been refactored from instanced squares into a single continuous plane geometry,
allowing smooth, volumetric deformation and large-scale looping structures.

Key changes

• Replaced InstancedMesh grid with a shared PlaneGeometry to ensure continuous surface deformation
• Implemented GPU-based attractor deformation in the vertex shader using De Jong equations
• Added position-based Z displacement to create true volumetric depth and large swirling loops
• Introduced multi-scale flow blending for richer and more organic deformation patterns
• Exposed attractor parameters (A, B, C, D), strength, and speed via scene controls
• Refined color scheme and grid aesthetics for improved readability and depth perception
• Updated camera defaults to better emphasize 3D loops and surface curvature

Technical details

• Deformation is computed per-vertex in the vertex shader based on world-space position
• Flow field acts as a continuous velocity field, preserving mesh connectivity
• Z deformation combines flow magnitude and attractor-based oscillation for increased volume
• All animation runs fully on the GPU for performance and smoothness

Result

The grid now behaves as a single deformable surface capable of forming large loops,
swirls, and volumetric structures, instead of independent moving cells.
This significantly improves visual coherence and overall aesthetic quality.