Add wallet module with receive and send functionality

- Introduced a new wallet module that includes components for sending and receiving Bitcoin payments.
- Implemented WalletService to manage payment links and transactions, including methods for creating LNURL pay links and sending payments.
- Added dialogs for receiving and sending payments, enhancing user interaction with the wallet.
- Updated app configuration to enable the wallet module and integrated it into the main application flow.

These changes provide users with a comprehensive wallet experience, allowing for seamless Bitcoin transactions.

src/core/services/PaymentService.ts

@@ -100,6 +100,14 @@ export class PaymentService extends BaseService {
     return wallet?.adminkey || null
   }
 
+  /**
+   * Get the preferred wallet's invoice key for read-only operations
+   */
+  getPreferredWalletInvoiceKey(): string | null {
+    const wallet = this.getPreferredWallet()
+    return wallet?.inkey || null
+  }
+
   /**
    * Generate QR code for Lightning payment request
    */