[Workers] deploy existing remix app to workers

[tanushree-sharma]

Stitched together from:

• https://github.com/threepointone/remix-workers-app/tree/main @threepointone
• https://github.com/zwily/remix/tree/workers-assets-classic-compiler/templates/classic-remix-compiler/cloudflare-workers
• and help from @GregBrimble!

Needs to be checked to make sure it follows best practices.