Add Crop Feature

[SuhailAhmed2627]

Description

Added Crop Feature. To use

• Click Crop Button
• Drag a rectangle on the canvas
• Cover the areas to be the final picture
• Mouse-button Up and the image will be cropped

Checklist

• [x] I am making a proper pull request, not spam.
• [x] I've checked the issue list before deciding what to submit.

Related Issues or Pull Requests

Closes #4

Add relevant screenshot or video (if any)

Click here for Video Demo

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