Major fixes:

- ChunkIterator is now bidirectional
- LineIterator is now also bidirectional
- Undo/redo history operations
- Replace operation
- Range based api functions
- And more minor bug fixes

include/utils/utils.h

@@ -1,8 +1,3 @@
 #pragma once
 
 #include "pch.h"
-
-struct Point {
-  uint32_t row;
-  uint32_t col;
-};