BMI Calculator UI Updated

[VardaPanchal005]

Fixes Issue🛠️

Closes #35

Description👨‍💻

updated the UI of the BMI calculator and added the age feature and all the functionalities will help to determine whether you are healthy or not

Type of change📄

• New feature (non-breaking change which adds functionality)

How this has been tested✅

Checklist✅

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• [] I have commented my code, particularly in hard-to-understand areas
• [] I have added demonstration in the form of GIF/video file
• I am an Open Source Contributor

Screenshots/GIF📷

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[Rakesh9100]

Can I know why you closed this PR and opened a new one @VardaPanchal005

[VardaPanchal005]

Can I know why you closed this PR and opened a new one @VardaPanchal005

I'm sorry I thought I didn't include all the files

[Rakesh9100]

Okay @VardaPanchal005