Fixes #320: Add a reading progress bar to the page

[thenullterminator]

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Did you read the instructions in README ?

Yes

Solves which issue ?

Fixes #320

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I have implemented reading progress bar using jqeury. To justify presence of progress bar I have also embedded trailer inside the page instead of having a button in the nav bar. Since jquery is not supported on github. I am adding few screenshots as well as live link to checkout the page layout.

LIVELINK: https://thenullterminator.github.io/OC19/

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[thenullterminator]

[prateek76]

@ananya-agrawal is embedding trailer inside the page needed? please help him in jquery part

[thenullterminator]

https://www.i-programmer.info/news/167-javascript/12017-github-removes-jquery-why.html

[prateek76]

@thenullterminator if github has removed jquery from its frontend , what it has to do with this issue