Implemented .bfuck file reading

include/lex.hpp

@@ -0,0 +1,16 @@
+#ifndef __LEX_H_
+#define __LEX_H_
+
+#include <string>
+
+/**
+ * @brief Lex a brainfuck file to a string from disk. Each element is a token.
+ * @param path The path to the file to be lexed
+ * @param tokens The string where the tokens will be written to
+ * @return True if the file was lexed successfully
+ */
+bool lex_brainfuck_file(const std::string &path, std::string &tokens);
+
+bool token_string_valid(std::string_view tokens);
+
+#endif