Add support for copying extra files to the dist folder in neu build

[rahulptl165]

Fixes: #216 by @cer1969

Add support for copying extra files to the dist folder in neu build

Summary:

This PR introduces a new feature in neu build that allows users to specify additional files to be copied to the dist folder without including them in resources.neu.

Changes Made:

• Added fileCopier.js module to handle file copying during the build process.
• Updated build.js to call fileCopier.copier() after bundling application.
• Introduced copyFiles option in config.js, allowing users to define which files should be copied.

Example Usage

Developers can now add a copyFiles array to their config.js like this:

module.exports = {
    cli: {
        copyFiles: ["app.ini", "config.json"]
    }
};

When running neu build, the specified files will be copied to the dist directory.

Tests:

• Tested on Windows.
• Tested on Linux (Needs verification).
• Tested on macOS (Needs verification).

Looking forward to feedback! 🚀