Add currency converter project

[riyaa060]

What does this PR do?

This pull request introduces a new currency converter project to the repository. The converter supports multiple currencies and provides real-time exchange rates.

Fixes #497

Type of change

• Bug fix (non-breaking change which fixes an issue)
• Chore (refactoring code, technical debt, workflow improvements)
• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

Mandatory Tasks

• [x] Make sure you have self-reviewed the code. A decent size PR without self-review might be rejected.

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[riyaa060]

Please check this @beRajeevKumar .I have made pull request again by updating in the script.js to make this project visible in the index.html page

[riyaa060]

Kindly add labels