move keyhandling from Tree

src/tft.cpp

@@ -1,6 +1,7 @@
 #include "tree.hpp"
 #include "utils.hpp"
 #include "parser.hpp"
+#include "ui.hpp"
 #include <ncursesw/ncurses.h>
 #include <iostream>
 #include <string.h>
@@ -31,7 +32,7 @@ int main(int argc, char* argv[])
 	}
 
 	init_ncurses();
-	tree.display();
+	displayTree(tree);
 
 	return 0;
 }