added responsive-dropdown menu when user not loged in

[paramsohal05]

🛠️ Pull Request Template

📄 Description

Added dropdown menu when user is not logged In on smaller devices
Now, there is a responsive dropdown menu available when user is not logged in Initially, there was no way to navigate or easy navigation to pages like "Features", "FAQ" on smaller devices. Responsive menu was only available when the user is logged in.

But now, dropdown icon is added on smaller devices to toggle dropdown menu which contains links to various pages like "How it works", "Features".
It looks good keeping consistency on both dark and light theme.
Please refer to screenshots attached below to see difference "Before" & "After"

Screenshots

Before

After

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✅ Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code where necessary
• I have made corresponding changes to the documentation
• My changes generate no new warnings or errors
• I have linked the related issue using Fixes #125

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📎 Related Issue

Fixes #125

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[paramsohal05]

@Bavanetha27 Kindly review and merge PR.