Add virtualized table, fuzzy search, and column picker

[sunipan]

Summary

• Replace server-rendered static table with virtualized client-side rendering (@tanstack/virtual-core)
• Add fuzzy search via minisearch with debounce, replacing substring filter
• Add grouped column picker with URL + localStorage persistence
• Inline model data as JSON at build time with script-tag safety escaping
• Defensive JSON/localStorage parsing with fallback behavior
• Preserve production header, dark mode, copy button, and mobile breakpoints

Live at https://models-dev.pages.dev

Testing

• bun run build / bun validate / bun x tsc --noEmit -p packages/web/tsconfig.json