feat: 🎸 NLP bot implementation using spacy completed

[yashksaini-coder]

✅ Closes: #234

This pull request introduces a comprehensive implementation of a Domino's Pizza Ordering Chatbot using Natural Language Processing (NLP). The changes span across documentation, core application logic, and testing. The key updates include the addition of detailed documentation, the implementation of the chatbot's core functionality, and a robust test suite to ensure the chatbot performs as expected.

Documentation:

• Added a detailed NLP_bot.md file outlining the chatbot's features, technical architecture, installation steps, usage, and future improvements.

Core Functionality:

• Implemented the chatbot's main logic in app.py, including state management, intent detection, entity extraction, and price calculation.

Testing:

• Created a comprehensive test suite in test_all.py to validate the chatbot's intent detection, entity extraction, price calculation, and order flow.

TESTING

pysnippets-NLP-bot.webm

@UTSAVS26 Kindly review this PR, and I implore you to give lvl 3 as I implemented spacy en_sem model for the NLP real conversations. See the attached video once

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