[Refactor] CardModal.jsx file is too big

[nmhossain02]

CardModal.jsx is 562 lines long at the moment, making it hard to navigate. Here are some suggested refactorings that would make the code look prettier:

• Extract component that renders when editing is true/false to new files
• Use theme variants for button stylings
• Extract image carousel components to new file (maybe)
• Extract onClick handlers outside of render method