implemented rfile reading

simulator_SIC_XE/include/file_reader.h

@@ -0,0 +1,19 @@
+#pragma once
+#include "reader.h"
+#include <string>
+#include <fstream>
+
+class FileReader : public Reader {
+public:
+    explicit FileReader(const std::string &path, std::ios::openmode m = std::ios::binary);
+    ~FileReader() override;
+
+    int readByte() override;
+    bool readBytes(uint8_t* buf, size_t len) override;
+    std::string readString(size_t len) override;
+
+    bool good() const;
+
+private:
+    std::ifstream in;
+};