Add a laser linewidth and bandwidth calculator

[Akashoa]

Description

A Laser Linewidth and Bandwidth Calculator is used to calculate the linewidth and bandwidth of a laser, which are critical parameters in determining the performance and applications of a laser system such as in fibre optics

Screenshots

No response

Checklist

• [X] I have checked the existing issues.
• [X] I follow Contributing Guidelines of this project.
• [X] 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

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

[github-actions[bot]]

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