fix(course-view): implement resizable and sheet for course view

[devsargam]

PR Fixes:

• Implement a sheet for the sidebar which makes it responsive in all sizes
• Setup a resizable to resize the video and timestamps which was weird in some cases

Resolves #401

Checklist before requesting a review

• [x] I have performed a self-review of my code
• [x] I assure there is no similar/duplicate pull request regarding same issue

[devsargam]

Siderbar Sheet

[devsargam]

Resizable video and timestamp

[TanmayDhobale]

bro ive fix the Siderbar Sheet alrdy in #381 can u check

[devsargam]

@TanmayDhobale didn't see that this is for a demo contribution video.

[TanmayDhobale]

@TanmayDhobale didn't see that this is for a demo contribution video.

Got it got it