started C implementation, created custom library for handling strings

final/editor.h

@@ -0,0 +1,18 @@
+#include "dynstr.h"
+
+typedef struct {
+    int screen_line;
+    int screen_col;
+    bool editmode;
+    String* buffer;
+} Editor;
+
+Editor new_editor();
+
+Editor editor_from(char* input_string);
+
+void move_cursor(Editor* self, int x, int y);
+void delchar(Editor* self);
+void addchar(Editor* self, char c);
+
+String* to_string(Editor* self);