Added Pendulum Calculator

[BarryByte]

Fixes Issue🛠️

Closes #1797

Description :-

The Pendulum Calculator is a web application that calculates various properties of a pendulum system based on the length of the pendulum (l), the gravitational acceleration (g), the amplitude (A), and the mass of the bob (m). The calculator computes the following properties:

• Period of the Pendulum (T)
• Frequency of the Pendulum (f)
• Angular Frequency (ω)
• Maximum Speed
• Maximum Acceleration
• Kinetic Energy at the Lowest Point
• Potential Energy at the Highest Point

Type of Change📄

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

Checklist✅

• [x] I am an Open Source contributor
• [x] I have performed a self-review of my code
• [x] My code follows the style guidelines of this project

Screenshots/GIF📷

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[DharshiBalasubramaniyam]

@Rakesh9100 sir, please don't merge this pr. Because this issue is raised by me. At the same time you have not assigned this issue to anyone yet. Same problem happen in the pr #1800

[Rakesh9100]

Do not create a PR until you have been assigned to an issue @BarryByte

[BarryByte]

@Rakesh9100 I will keep that in mind, sorry for the inconvenience.