Implement responsive Navbar with mobile support

[Dippp10-ally]

🔗 Which issue does this PR close?

• Closes Improve navbar responsiveness across all devices #437

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📌 Rationale for this change

This change is proposed to improve code quality, usability, or functionality by addressing the issue described in the linked ticket. It helps improve user experience, maintainability, or performance depending on the context of the change.

If the reasoning is already well explained in the issue, this section can be considered optional.

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🛠 What changes are included in this PR?

• Added: [describe new functionality]
• Fixed: [describe bug fixes]
• Updated: [describe improvements or refactoring]
• Removed: [if anything was deleted]

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🧪 Are these changes tested?

• Manual testing completed
• Tested across different devices/screens (if UI related)
• Existing tests pass successfully
• New tests added (if applicable)

Testing Details (if applicable)

• Test case 1: Steps → Expected result → Actual result
• Test case 2: Steps → Expected result → Actual result

👉 If no tests are included:
Explain why testing is not required or how the change is covered by existing tests.

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👀 Are there any user-facing changes?

• Yes
• No

If Yes:

• UI changes (describe what changed)
• New features visible to users
• Behavior changes in existing features

Documentation Updates (if needed)

• README updated
• Contributing guidelines updated
• No documentation changes required

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💡 Additional Notes

• Breaking changes (if any)
• Future improvements
• Known issues or limitations
• Deployment considerations

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[vercel]

@Dippp10-ally is attempting to deploy a commit to the Vikas' projects Team on Vercel.

A member of the Team first needs to authorize it.

[Dippp10-ally]

@ItsVikasA ji , do assign labels called as gssoc:approved , level:intermediate , type:feature , quality:exceptional to pull request number 440....do merge above pull request number 440.....

[Dippp10-ally]

@ItsVikasA ji , below are screenshots prior to making changes.....

[Dippp10-ally]

@ItsVikasA ji , below are screenshots after making changes .....