Added chatbot

[govindumeesala]

🛠️ Fixes Issue

Closes #47

👨‍💻 Description

• Toggle Button: The img at the bottom of the website acts as a button that toggles the chatbot's visibility.
• Chatbot Window: The chatbot window is hidden initially and toggles open/close when the button is clicked.
• Predefined Questions: The bot responds based on the predefined questions (predefinedQA). If the user asks a question not in the predefined list, the bot responds with "I'm sorry, I don't understand that question."
• Responsive: The chatbot layout is responsive and can adjust to different screen sizes.

📄 Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update (adds or updates related documentation)

📷 Screenshots/GIFs (if any)

✅ Checklist

• I am a participant of GSSoC-ext.
• I have followed the contribution guidelines of this project.
• I have viewed deployment of my code.
• My changes generate no new warnings.
• I have added documentation to explain my changes.

🤝 GSSoC Participation

• This PR is submitted under the GSSoC program.
• I have taken prior approval for this feature/fix.

@zalabhavy please check this out

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