feat: add interactive random_color usage example

[Sparsh300]

Synopsis

A second example of using random_color that shows an interactive color-changing rectangle has been included.# Included Files

Random_color-2-example.cpp
The file random_color-2-example.py

• random_color-2-example-oop.cs
• random_color-2-top-level-example.cs
  Random_color-2-example.txt
• random_color-2-example.png ## What the illustration accomplishes

When the user clicks the mouse, this example opens a graphical window and modifies the color of the rectangle. It shows how to use interactive graphics and event handling with random_color().# Examining

Run to test:
The version in C++
The version in Python
The version in C#

confirmed that:
The window opens properly.
Mouse clicks are picked up.
The rectangle undergoes dramatic color changes.

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