Add a air fuel ratio calculator

[Akashoa]

Description

An Air-Fuel Ratio (AFR) Calculator is a tool used to calculate the ratio of air to fuel used in an internal combustion engine. The ratio of air to fuel is critical in determining the efficiency and emissions of the engine.

Screenshots

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Checklist

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

Code of Conduct

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

[github-actions]

Hey @Akashoa, Welcome to the project CalcDiverse! 🎊
Thanks for opening an issue! 🙌 Please wait for the issue to be assigned. Happy Coding!! ✨