Create FullPost component

[nilaymaj]

Create a component for displaying the full post - this will be used for the view post screen.
You'll need two props:

• A post object of type IPost
• An onOpenComments function of type () => void: call this function when the user taps on the button for opening the comments section.

[devanshusingla]

I am taking this issue

[7shivamx]

I will be working on this issue

[kartikcode]

Fixed with #24 .