Added an about page

[tend2infinity]

Closes: #156

Describe the changes you've made

I have moved some components to the about page and added some new components as well! I have used the GitHub API to get the information about the contributors. I have also added some styling libraries!

Type of change

What sort of change have you made:

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Enhancement in the existing features
• [ ] Other

Mention any unusual behavior of your code (Write NA if not)

Any unusual behavior of your code

Checklist:

• [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, particularly wherever it was hard to understand.
• [x] My changes generate no new warnings.
• [x] I have verified/tested my code by running it locally.

Video

https://user-images.githubusercontent.com/61948033/119116842-48652f80-ba46-11eb-8a02-672365ec356a.mp4

[tend2infinity]

Done the required changes

[sagar-barapatre]

resolve the conflicts.

[tend2infinity]

@Namanl2001 Done the required changes, sorry for being inactive for a while!