docs: Update in-app wallet backend API link (#4572)

## Problem solved

Short description of the bug fixed or feature added

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## PR-Codex overview
This PR updates redirects and icon imports in the `portal` app and refactors the sidebar in `sidebar.tsx`.

### Detailed summary
- Added a new redirect for in-app wallet details on the server
- Reordered icon imports in `sidebar.tsx`
- Updated sidebar links for In-App Wallet and Ecosystem Wallet pages

> The following files were skipped due to too many changes: `apps/portal/src/app/connect/sidebar.tsx`

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Author: joaquim-verges

apps/portal/redirects.mjs

@@ -705,6 +705,7 @@ const otherRedirects = {
 	"/unity/wallets/providers/embedded-wallet": "/unity/wallets/providers/in-app-wallet",
 	// connect
 	"/connect/connect": "/connect/sign-in",
+	"/connect/in-app-wallet/how-to/get-in-app-wallet-details-on-server": "/connect/in-app-wallet/guides/get-in-app-wallet-details-on-server",
 };
 
 const v5RestructuredRedirects = {