So I don't know if you want to tell me this but my question is how do you make something like this i have been searching for a long time how to make a basic clean text editor/code editor and now i'm actually trying to make it for a school project this looks really cool and really want to know how i can make this myself

Giving a tuturial link also helps :)

P.S. Sorry if i'm some annoying kid that wants to know things but i'm just curious

Another Question how do I make the file as an app because I don' t really want to use it in a site :/