feat(classes/player) Add "getAccountMoney" method

[Zykem]

Description

Adds a new method getAccountMoney to the xPlayer object to retrieve the current money amount of a specified account. This simplifies fetching account balances directly from the player object.

---

Motivation

Currently, retrieving the money of a player’s account requires calling getAccount and then accessing the money field. Adding getAccountMoney provides a more straightforward, readable, and convenient way to get account balances, improving code clarity.

---

Implementation Details

• Added a new function xPlayer.getAccountMoney(accountName) that returns the money value of the specified account.
• The method returns nil if the account does not exist.
• This method internally calls the existing getAccount method and safely accesses the money field.

---

Usage Example

local money = xPlayer.getAccountMoney("bank")
if money then
    print(("Player has %d in bank account"):format(money))
else
    print("Account not found")
end

---

PR Checklist

• [x ] My commit messages and PR title follow the Conventional Commits standard.
• [x ] My changes have been tested locally and function as expected.
• [x ] My PR does not introduce any breaking changes.
• [x ] I have provided a clear explanation of what my PR does, including the reasoning behind the changes and any relevant context.

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
1 out of 4 committers have signed the CLA.

:white_check_mark: Kenshiin13
:x: Kr3mu
:x: Zykem
:x: github-actions[bot]
_{You have signed the CLA already but the status is still pending? Let us recheck it.}