Sticky card implemented on frontend

[ruchikamuddinagiri]

Issue Number

ISSUE #17 closes #17

Describe the changes you've made

Added an add button in the top right corner of all columns (unchecked, checked, in progress and members) to automate the process of adding more sticky cards. Implemented auto-scrolling and smooth-scrolling within the card for when new cards are added.

Describe if there is any unusual behaviour of your code(Write NA if there isn't)

NA

Additional context (OPTIONAL)

Test plan (OPTIONAL)

-- nodemon app.js -- go to url "/student"

Checklist

• [x] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [x] I have read the CODE OF CONDUCT document.
• [ ] I have added tests to cover my changes.
• [ ] All new and existing tests passed.
• [ ] The title of my pull request is a short description of the requested changes.
• [x] Participating in SWOC2021.
• [ ] Participating in DWOC.

[Harshita248]

Great work @ruchikamuddinagiri