📝[Docs]: NLP guide

[yashksaini-coder]

Description

This pull request includes significant updates to the NLP/README.md file, providing a comprehensive guide on Natural Language Processing (NLP)

• Added an introduction to Natural Language Processing (NLP) and its significance in machine learning.
• Included a workflow diagram using Mermaid to visually represent the script's process.
• Detailed the steps and processes involved in the script, such as ensuring NLTK resources are available, loading the SentenceTransformer model, reading input text, extracting keywords, generating a text summary, and displaying results.

Fixes #1591

Type of change

• Added a new machine learning frameworks, libraries or software.
• Documentation update

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warningsX

[github-actions]

Thank you for submitting your pull request! 🙌 We'll review it as soon as possible. In the meantime, please ensure that your changes align with our CONTRIBUTING.md. If there are any specific instructions or feedback regarding your PR, we'll provide them here. Thanks again for your contribution! 😊

[yashksaini-coder]

@sanjay-kv sir I have created a simple NLP guide for the NLP project folder, please review the PR