Updated the Momentum calculator to support different measurements for Mass and Velocity

[Pasqua101]

Issue Id you have worked upon -

As mentioned in issue #645 I have created a drop down menu for the user to select different measurements for mass and velocity. Also did some reformatting of the return to make things a little more neater,

Briefly explain your program logic -

The user selects the measurements for mass and velocity, and upon clicked the calculate momentum button, the code will take the values and convert it to the respected values needed to find kg m/s for momentum.

Screenshots(Attach 2 screenshots of your own input and output) -

By raising this PR I affirm that -

• [x] My code follows the guidelines of this project.
  

• [x] I have performed a self-review of my own code.
  

• [x] I have commented my code.
  

• [x] My code gives the correct output.
  

• [x] I affirm that I strictly follow contributing guidelines and code of conduct.

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Name	Status	Preview	Comments	Updated (UTC)
calc-for-everything	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Nov 21, 2023 7:00pm

[SarthakKeshari]

Congratulations 🎉 @Pasqua101 on your contribution. Thanks for adding value to this repository. 😊

Project is live at - https://calc-for-everything-psi.vercel.app/

[Pasqua101]

Thanks for accepting my PR. I'm looking for some other open source projects to contribute to. Would you happen to know any good ones?