Drag and Drop Support

Usually if I want to implement a new feature, I would ask Claude how I would do it and what APIs I should use, note that Im not just vibe coding everything, Im just asking it how to do smth. This time tho, I decided not to do that and to directly look at Apple Docs, and it was pretty helpful. I was able to figure out how to implement more animations and figure out how to implement drag and drop support which was kinda hard but I was able to implement it. I also fixed a folder bug and did some stuff for the wiki.