Prevent overflow and add Leetcode lists

[The-CodingSloth]

awesome work man, this feature is pretty cool

[Tayomide]

Thanks! It will solve a lot of problems, and any roadblock had in the future could be solved by creating a new list and making an API request to get the list of problems

The best part is the Leetcode API would serve as a makeshift server, and all the extension has to do is make a request to it