[Feature] Dropdown box in search bar

[sharmi4590]

Description

A Drop-down box would make the user much easier to think rather than searching through keywords. It will give an idea to the user how many calculators are present in the webpage and they can select any one. I am GSSOC'24 contributor.

Screenshots

Checklist

• [X] I have checked the existing issues.
• [X] I follow Contributing Guidelines of this project.
• [ ] I am a IWOC'24 contributor.
• [ ] I am a JWOC'24 contributor.
• [ ] I am a SWOC'24 contributor.

Code of Conduct

• [X] I agree to follow this project's "Code of Conduct".