refactored ast, started lexer

include/lexer/Lexer.h

@@ -0,0 +1,15 @@
+#pragma once
+#include <string>
+
+namespace lexer {
+    struct State {
+        std::string sourceText;
+        char* currentPosition;
+        int line;
+        int column;
+    };
+
+    struct Lexer {
+
+    };
+}