Feature: LeetPlug on contest and explore pages

[acherukuri]

@LorenzoBe, First of all, thank you very much for developing this extension and open-sourcing it.

Currently, the extension works as expected on the https://leetcode.com/problems/*. Do you have any plans on extending it to work on /contests/* and /explore/* pages as well?

[LorenzoBe]

Dear @acherukuri, thanks for the request. It should not be difficult to adapt the script to other pages. I was thinking to the explore pages at least, since there are some very nice learning paths to follow. Unfortunately I don't have time in this period, but I would be happy to accept and publish any pull request to extend the project to the explore problems.