React Router 7 is the successor to Remix.

We should upgrade our template:
https://github.com/remotion-dev/remotion/tree/main/packages/template-remix (Source of truth)
https://github.com/remotion-dev/template-remix (Standalone repo, which is copied from source of truth)

You can decide which one to work on, but the Remotion tests should pass on the template (validate-templates.test.ts)

Let's upgrade the template to use React Router 7 instead of Remix.
It should follow the new best React Router 7 practices, and keep the same functionality.

References in the code should be changed from "Remix" to "React Router 7".

💎 This issue has a bounty on it!

Read our contributing guidelines:

• How to contribute: https://www.remotion.dev/docs/contributing/
• Implementing a new feature: https://www.remotion.dev/docs/contributing/feature
• Implementing a new option: https://www.remotion.dev/docs/contributing/option
• Write documentation: https://www.remotion.dev/docs/contributing/docs
• Bounty information: https://www.remotion.dev/docs/contributing/bounty

/bounty 250