Update Remix to 3.0.0-beta.5 (#75)

* Update Remix to 3.0.0-beta.5

Co-authored-by: Kent C. Dodds <me+github@kentcdodds.com>

* Use public Remix cookie entrypoint

Co-authored-by: Kent C. Dodds <me+github@kentcdodds.com>

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Co-authored-by: Cursor Agent <cursoragent@cursor.com>

Author: kentcdodds