Start work on parser code generation

src/code_gen/c_code.h

@@ -0,0 +1,13 @@
+#ifndef __tree_sitter__code_generator__
+#define __tree_sitter__code_generator__
+
+#include "grammar.h"
+#include "parse_table.h"
+
+namespace tree_sitter {
+    namespace code_gen {
+        std::string c_code(const Grammar &grammar, const lr::ParseTable &parse_table);
+    }
+}
+
+#endif