An option for user to change summary length

[Aadityaa2606]

Feature Description: For now, the summary length in the application is fixed which means for bigger articles the summary is too tiny to be readable and misses many key points that must be covered in a summary.

Solutions:

Add 3 buttons near the change them toggle Summary Length

1. small
2. medium
3. large

Additional things to consider while contributing

• Make sure that the buttons stick with the current theme

• Use relative positioning, flex box, and refrain from using absolute positioning.

• Add comments to the code you write