Add material browse categories

[wass08]

Summary

• add Wallpaper, Plastic, and Carpet to the shared material-category taxonomy
• allow host applications to register dynamic materials under the new browse categories

Test plan

• bun run typecheck
• bun run build

🤖 Generated with Codex

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Note

Low Risk
Small additive change to a shared constant/type with no runtime behavior changes beyond accepting new category values.

Overview
Extends the shared MATERIAL_CATEGORIES list (and the derived MaterialCategory type) with wallpaper, plastic, and carpet, placed among the existing browse groupings so material pickers and filters can expose dedicated tabs for those finishes.

No static MATERIAL_CATALOG entries are added in this change; the new values mainly let host apps register dynamic library materials under these categories via registerLibraryMaterials / getMaterialsForCategory.

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