Added example for Polar with remix

[ronitize]

#12

• ensure best practices with the use of env and other underlying services by the framework
• name it as with-remix
• use prettier as done in https://github.com/polarsource/examples/tree/main/export-all-customers-to-csv
• install the latest version of Polar and Remix
• maintain separate API routes for each, Webhooks handler, Customer Portal handler and Checkout handler
• add an optional build-time script that validates if the access token used is valid for creating a checkout session in the relevant Polar mode (sandbox/production)
• create an installation guide like as in https://github.com/neondatabase/examples/tree/main/with-nestjs
• create the .env.example with the comments to the guides links of where the values can be obtained from
• share the deployed application to Vercel with the recording of all the 3 functionalities working

Deployed URL - https://polar-remix.vercel.app

output.mp4

[vercel]

@ronitize is attempting to deploy a commit to the polar-sh Team on Vercel.

A member of the Team first needs to authorize it.

[rishi-raj-jain]

@ronitize I'll respond on this by end of the next week.