I added the NekoVsPurple theme
I fixed some visual bugs in both the readme and the theme.
I added more codes to test the syntax highlighting of the themes, and added two more themes to the collection.
I changed the readme to make it clearer and more concise. And i made some changes to the colors of the NekoVsPurple theme, removing some parts that made it boring.
Adding the NekoVsDracula theme