fix(docs): redirect use-data-grid-* registry items to tablecn

[Dtem4ik]

Fixes sadmann7/tablecn#1142

Problem

pnpm dlx shadcn@latest add @diceui/use-data-grid-undo-redo fails with a 404:

The item at https://diceui.com/r/use-data-grid-undo-redo.json was not found.

The file itself exists and is served fine by tablecn (https://tablecn.com/r/use-data-grid-undo-redo.json returns 200). The issue is in the redirect rule in docs/next.config.ts, which forwards data grid registry items to tablecn:

source: "/r/:component(data-table.*\\.json|data-grid.*\\.json)",

The new hook is named use-data-grid-undo-redo, so it doesn't match either alternative. The request falls through to the flat rewrite (/r/:name.json → /r/styles/radix-vega/:name.json), and since the item doesn't exist in the local registry, it 404s.

Fix

Add use-data-grid.*\.json as a third alternative to the redirect pattern. It's kept narrow on purpose so diceui's own hooks (use-mobile, use-as-ref, use-lazy-ref, etc.) keep resolving from the local registry. Any future use-data-grid-* hooks published by tablecn will be covered as well.

Verification

Tested the pattern with path-to-regexp (the matcher Next.js uses for redirects()):

Path	Result
/r/use-data-grid-undo-redo.json	redirected to tablecn ✅
/r/data-grid.json	redirected to tablecn (unchanged)
/r/data-table-filter-list.json	redirected to tablecn (unchanged)
/r/use-mobile.json	falls through to local registry (unchanged)
/r/use-as-ref.json	falls through to local registry (unchanged)
/r/radix-vega/data-grid-demo.json	falls through to rewrites (unchanged)

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