Add errors

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

source/err.h

@@ -0,0 +1,15 @@
+#pragma once
+#include <utils/types.h>
+
+typedef struct {
+    u16 err;
+    u16 loc;
+    char* file;
+} ErrCode_t;
+
+enum {
+    TE_ERR_UNIMPLEMENTED = 21,
+};
+
+#define newErrCode(err) (ErrCode_t) {err, __LINE__, __FILE__}
+void DrawError(ErrCode_t err);