Ghibli toon shading for foliage, bark and props

Adds Studio Ghibli–style anime shading to existing three.js MeshStandardMaterial/MeshPhysicalMaterial objects via one onBeforeCompile patch helper — banded toon diffuse that keeps soft PCF shadows and GGX specular (RE_Direct wrapper), warm never-grey shadow fill, spherical "puff" normals for foliage clumps (k-means clusterCenter for baked GLB leaves), backlit subsurface glow, rim light, painterly leaf flecks, warm grained bark, and world-space wind with matching customDepthMaterial so dappled shadows move. Use when the user asks for Ghibli/anime/cel/toon look on trees, bushes or props, painterly foliage, puffy canopies, toon ramp without banded shadows, leaf wind sway, or…