Display Total Coins in Wallet GUI

[vlasfama]

Describe the problem you'd like to have solved

The wallet GUI lacks a total coin balance display.

A clear and concise description of what the problem is.

In the current wallet GUI, there’s no option to view the total coin balance directly. Only the validator staking and rewards address balances are visible, requiring manual calculation to determine the overall token total.

Describe the ideal solution

Add Total coins and Value in USD.

A clear and concise description of what you want to happen.

Add a "Total coins" row in the wallet GUI to display the combined balance of all coins, including staking and rewards. Additionally, fetch the current price from an explorer to display the total worth in USD, providing users with both the coin total and its equivalent USD value at a glance.