interactive-comments-section, desktop-first

Could definitely have used Context API instead of all this different state calls and passing props on and on (will prob try to implement it later). I could not save replies to localstorage, only top level comments, probably because of the state being managed in different places. Again, this one was pretty hard for me, considering my lack of experience, but I accepted the challenge with open arms as a way to learn through hard practicing. I believe I've missed the 'main' and 'h1' tags for a better semantic feature too.