Feat: Add Watchlist

[AkashJana18]

Feature Overview
Add a watchlist feature that allows users to select and track specific cryptocurrencies of their choice directly within the Cryptack application.

Detailed Description
The watchlist should enable users to:

• Select multiple cryptocurrencies from the available list.
• View real-time updates (e.g., prices, trends) for the coins in their watchlist.
• Easily add or remove cryptocurrencies from their watchlist.

Reason for Feature
This feature would enhance user engagement by allowing personalized tracking of preferred coins, improving the overall user experience for those who follow specific cryptocurrencies.

Design Considerations

• Refer Figma Design The watchlist interface should be intuitive, with options to add or remove coins with minimal effort.
• Consider displaying the watchlist in a dedicated section of the UI, possibly with a quick-access button or menu.
• Ensure that the feature integrates seamlessly with the existing data-fetching mechanisms to maintain real-time updates.

Additional Context

• Use local storage to save the data