Add word frequency counter feature

[intbizoil]

Pull Request Title

Add Word Frequency Counter Feature

Pull Request Description

What Changed

• Created a new Python script, word_counter.py, which counts the frequency of each word in a given text file.

Why This Is Useful

• Allows users to quickly analyse text files for word usage.
• Simplifies text analysis tasks for anyone working with large amounts of textual data in the repository.

How It Works

1. word_counter.py reads the file specified via command-line argument.
2. Converts all words to lowercase and splits them on whitespace.
3. Uses collections.Counter to count occurrences and sorts them in descending order.
4. Prints the results to the console.

Testing

• Created a sample file sample.txt with the content: