[Dashboard] Add nexus to framer-rewrites.js (#8287)

<!--

## title your PR with this format: "[SDK/Dashboard/Portal] Feature/Fix: Concise title for the changes"

If you did not copy the branch name from Linear, paste the issue tag here (format is TEAM-0000):

## Notes for the reviewer

Anything important to call out? Be sure to also clarify these in your comments.

## How to test

Unit tests, playground, etc.

-->

<!-- start pr-codex -->

---

## PR-Codex overview

This PR focuses on updating the routing paths in the `apps/dashboard/framer-rewrites.js` file by adding a new route for `/nexus` and ensuring existing routes are retained.

### Detailed summary

- Added the route `"/nexus"` to the existing routing configuration.
- Retained existing routes: `"/payments"`, `"/payments/x402"`, `"/auth"`, `"/in-app-wallets"`, and `"/transactions"`.

> ✨ Ask PR-Codex anything about this PR by commenting with `/codex {your question}`

<!-- end pr-codex -->

<!-- This is an auto-generated comment: release notes by coderabbit.ai -->

## Summary by CodeRabbit

* **New Features**
  * Added support for the new "/nexus" route in the dashboard application.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Author: joaquim-verges

apps/dashboard/framer-rewrites.js

@@ -11,6 +11,7 @@ module.exports = [
   "/account-abstraction",
   "/payments",
   "/payments/x402",
+  "/nexus",
   "/auth",
   "/in-app-wallets",
   "/transactions",