Add Alternative Huffman Coding Implementation Using Priority Queue and Modular Design

[sushanth-shetty11]

This pull request introduces an alternative implementation of the Huffman Coding algorithm for compressing text files. The proposed solution offers the following features:

Efficient Priority Queue Handling: Utilizes Python's heapq module to manage the min-heap for constructing the Huffman tree efficiently.
Modular Design: Divides the logic into clear, reusable functions such as frequency calculation, tree building, code generation, and encoding.
Improved Readability: Ensures clean and well-documented code with meaningful function and variable names, making it easier to understand and maintain.
Formatted Output: Displays the generated Huffman codes and encoded file contents in a structured manner for better user experience.
This implementation complements the existing project by providing an alternative approach that is easy to extend and optimize. It can serve as an example of how to use Python's built-in modules effectively for real-world algorithms.