refactor: update IVault interface with latest contract impl changes

Author: maxpushka

src/interfaces/IVault.sol

@@ -51,15 +51,15 @@ interface IVault {
      * @param token The address of the token. Use address(0) for ETH.
      * @return The balance of the specified token for the user.
      */
-    function balanceOf(address user, address token) external view returns (uint256);
+    function balanceOf(address token) external view returns (uint256);
 
     /**
      * @dev Returns the balances of multiple tokens for a user.
      * @param user The address of the user.
      * @param tokens The addresses of the tokens. Use address(0) for ETH.
      * @return The balances of the specified tokens for the user.
      */
-    function balancesOfTokens(address user, address[] calldata tokens) external view returns (uint256[] memory);
+    function balancesOfTokens(address[] calldata tokens) external view returns (uint256[] memory);
 
     /**
      * @dev Deposits a specified amount of tokens or ETH into the vault.