Added Binary Search Folder

[Sharyupatil01]

This PR adds a well-structured Binary Search module under the Java directory to improve clarity and learning flow.

What’s included

• Added a Binary Search folder under Java
• Organized content into two subfolders:
  1. Binary Search on 1D
     • Classic binary search problems on sorted arrays
  2. Binary Search on Answers
     • Problems where binary search is applied on the solution space instead of the array

Additional Improvements

• Included a clear, step-by-step explanation of the Binary Search on Answers approach
• Added a visual explanation to make the concept easier to understand
• Focused on helping beginners identify when and how to apply binary search beyond sorted arrays

Please let me know if any naming or structure changes are required. Happy to refine further 🙂