Add errors

and prepare for file menu more
and fix that you can't go left right when going up down

source/fs/menus/filemenu.c

@@ -0,0 +1,11 @@
+#include "filemenu.h"
+#include "../../err.h"
+#include "../../gfx/menu.h"
+
+MenuEntry_t FileMenuEntries[] = {
+    // Still have to think up the options
+};
+
+void FileMenu(FSEntry_t entry){
+    DrawError(newErrCode(TE_ERR_UNIMPLEMENTED));
+}