created bank app framework and Guard Check Pattern

Author: code-architect

Bank_App/.gitignore

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+node_modules
+.env
+
+# Hardhat files
+/cache
+/artifacts
+artifacts
+# TypeChain files
+/typechain
+/typechain-types
+
+# solidity-coverage files
+coverage
+coverage.json

Bank_App/README.md

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+# Sample Hardhat Project
+
+This project demonstrates a basic Hardhat use case. It comes with a sample contract, a test for that contract, and a Hardhat Ignition module that deploys that contract.
+
+Try running some of the following tasks:
+
+```shell
+npx hardhat help
+npx hardhat test
+REPORT_GAS=true npx hardhat test
+npx hardhat node
+npx hardhat ignition deploy ./ignition/modules/Lock.js
+```

Bank_App/contracts/BankApp.sol

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+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.0;
+
+contract BankApp
+{
+    // deposit
+    // withdraw
+    // balance
+}

Bank_App/hardhat.config.js

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+require("@nomicfoundation/hardhat-toolbox");
+
+/** @type import('hardhat/config').HardhatUserConfig */
+module.exports = {
+  solidity: "0.8.24",
+};