Body Fat Percentage Extension

[samarsajad]

Description

Added a body fat percentage calculator extension that takes the circumfrence of neck, waist and hips(for females) in cms and determines the body fat percentage in the body

Fixes: #889

Type of change

• [] Bug fix (non-breaking change which fixes an issue)
• [] New feature (non-breaking change which adds functionality)
• [] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [] This change requires a documentation update

Checklist:

• I have made this from my own
• I have taken help from some online resourses
• 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 made corresponding changes to the documentation
• My changes generate no new warnings

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[github-actions]

Thank you for submitting your pull request! 🙌 We'll review it as soon as possible. In the meantime, please ensure that your changes align with our CONTRIBUTING.md. If there are any specific instructions or feedback regarding your PR, we'll provide them here. Thanks again for your contribution! 😊

[samarsajad]

Please review my pull request @Sulagna-Dutta-Roy