feat: add support for all world timezones in Digital Clock

[ash1shkumar]

Related Issue

Fixes #2134

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Description

Added support for all world timezones in the Digital Clock project using the JavaScript Intl API.

Features Added

• Dynamic support for all IANA timezones
• Automatic local timezone detection
• Removed hardcoded timezone options
• Improved scalability and user experience
• Added responsive dropdown improvements

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Type of PR

• Bug fix
• Feature enhancement
• Documentation update
• Security enhancement
• Other (specify): _______________

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Screenshots / Videos (if applicable)

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Checklist

• I have performed a self-review of my code.
• I have read and followed the Contribution Guidelines.
• I have tested the changes thoroughly before submitting this pull request.
• I have provided relevant issue numbers, screenshots, and videos after making the changes.
• I have commented my code, particularly in hard-to-understand areas.
• I have followed the code style guidelines of this project.
• I have checked for any existing open issues that my pull request may address.
• I have ensured that my changes do not break any existing functionality.
• Each contributor is allowed to create a maximum of 4 issues per day. This helps us manage and address issues efficiently.
• I have read the resources for guidance listed below.
• I have followed security best practices in my code changes.

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Additional Context

This enhancement improves the functionality and scalability of the Digital Clock project by allowing users to select any supported world timezone dynamically instead of relying on a limited predefined list.

[vercel]

@ash1shkumar is attempting to deploy a commit to the Dhairya Gothi 's projects Team on Vercel.

A member of the Team first needs to authorize it.

[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! 😊

[ash1shkumar]

Hi @dhairyagothi , I have completed the implementation for Issue #2134 regarding adding support for all world timezones in the Digital Clock project. Kindly review my PR. Thank you!

[dhairyagothi]

Please resolve merge conflicts before this PR can be merged.

[dhairyagothi]

Please resolve merge conflicts before this PR can be merged.

[ash1shkumar]

Please resolve merge conflicts before this PR can be merged.

done @dhairyagothi