Portal: Add missing redirects for bridge pages (#8201)

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## PR-Codex overview
This PR focuses on updating the redirect paths in the `redirects.mjs` file to streamline payment-related navigation by adding new routes that point to a `bridge` structure.

### Detailed summary
- Added redirect for `"/payments/sell"` to `"/bridge/sell"`
- Added redirect for `"/payments/swap"` to `"/bridge/swap"`
- Added redirect for `"/payments/tokens"` to `"/bridge/tokens"`
- Added redirect for `"/payments/routes"` to `"/bridge/routes"`

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

* **New Features**
  * Added redirects so payment URLs now route to corresponding bridge destinations:
    * /payments/sell → /bridge/sell
    * /payments/swap → /bridge/swap
    * /payments/tokens → /bridge/tokens
    * /payments/routes → /bridge/routes
  * Existing bookmarks and shared links to payment pages will continue working and automatically route to the updated locations, with no UI changes required.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Author: MananTank

apps/portal/redirects.mjs

@@ -738,6 +738,10 @@ const paymentRedirects = {
   "/connect/pay/buy-with-fiat": "/payments",
   "/connect/pay/enable-test-mode": "/payments",
   "/connect/pay/guides/enable-test-mode": "/payments",
+  "/payments/sell": "/bridge/sell",
+  "/payments/swap": "/bridge/swap",
+  "/payments/tokens": "/bridge/tokens",
+  "/payments/routes": "/bridge/routes",
 };
 
 const contractRedirects = {