feat: Make sidebar expandanable

[siwamsingh]

Description

• make the side bar ( if already made) expandable.
• if the side bar is not made then go to issue UI: Make a side bar  #12 and try completing it.

Task

• Go to Sidebar.jsx in src/components/Sidebar directory and try to make the existing navbar expandable.
• mention how you are going to implement this while requesting for assignment.

Implementation 🔽

[Abhijeet2242]

/assign

[siwamsingh]

/assign

I have assigned the issue to you.