Create user stories for 'calculators'

[UdyrTsaige]

• [x] Create BMI calculators with accurate data upon response
• [x] Create a Metabolic rate
• [x] Create calculator for calories burnt
• [x] Track Macros
• [x] Research: Decide on types of calculators needed (e.g., BMI, calorie intake).
• [x] Design: Sketch the UI for each calculator.
• [x] Implementation: Develop the calculator functionalities.
• [x] Testing: Ensure accuracy and reliability of calculations.
• [x] Bootstrap Input Groups: Implement Bootstrap input groups for calculator inputs.
• [x] CSS Styling: Customize the calculator's appearance with CSS.
• [x] Responsive Design: Make calculators responsive using Bootstrap's layout classes.