Deprecate upup-react-file-uploader on npm with a pointer to @upupjs/*

[BSalaeddin]

upup-react-file-uploader is still published on npm with no deprecation notice — npm view upup-react-file-uploader deprecated comes back empty. Anyone landing on it from older posts or search results will npm install the frozen 2.0.0 and never learn the project moved to @upupjs/*.

A one-liner fixes it:

npm deprecate upup-react-file-uploader "Renamed: use @upupjs/react (or @upupjs/next) — see https://dev.useupup.com/docs/migration/v1-to-v3"

That makes every install print the pointer to the new packages and the migration guide.

[AminDhouib]

Confirmed against the registry: upup-react-file-uploader is not currently deprecated, and its latest tag still points at 2.0.0. v3 ships under the @upupjs scope, so anyone landing on the old package gets a two-major-versions-stale uploader with no pointer forward.

The deprecation needs to be run by an account with publish rights on the package (omitting a version range covers every published version):

npm deprecate upup-react-file-uploader "upup-react-file-uploader is deprecated and no longer maintained. Use @upupjs/react (v3+) instead — migration guide: https://useupup.com/docs/migration/v1-to-v3"

Keeping this open until that's done. Worth covering the superseded @useupup/*@3.0.0 packages in the same pass.