Update dependencies and enhance App component functionality

- Added new dependencies: @polkadot/util and @gear-js/api to package.json and example/package.json.
- Implemented a test function in App component to interact with GearApi for balance transfer.
- Updated transaction signing logic to support both raw and payload types.
- Refactored Wallet class to improve socket connection handling and transaction management.
- Enhanced WalletStore by removing unnecessary listener setup code.

src/types.ts

@@ -7,12 +7,6 @@ declare global {
 
 export type WalletStorage = Storage;
 
-export type InjectionConfig = {
-    callbackUrl: string;
-    connectTimeout?: number;
-    closeAppOnActions?: boolean;
-}
-
 export type WebApp = typeof WebAppConst;
 export interface ConnectRequest {
     method: 'connect';
@@ -20,10 +14,10 @@ export interface ConnectRequest {
 }
   
 export interface SignTransactionRequest {
-    method: 'signTransaction';
+    method: 'sT';
     id: number;
-    tx: string;
-    wallet: string;
+    tx: `p:${string}` | `bytes:${string}`;
+    wallet?: string;
     callback: string;
 }