demo: renamed demo folder to sample, updated readme

sample/utils_demo/CMakeLists.txt

@@ -0,0 +1,2 @@
+add_executable(demo_protocol_detector demo_protocol_detector.cpp)
+target_link_libraries(demo_protocol_detector ugv_sdk)

sample/utils_demo/demo_protocol_detector.cpp

@@ -0,0 +1,35 @@
+/*
+ * demo_protocol_detect.cpp
+ *
+ * Created on: Jul 15, 2021 14:10
+ * Description:
+ *
+ * Copyright (c) 2021 Weston Robot Pte. Ltd.
+ */
+
+#include <memory>
+#include <iostream>
+
+#include "ugv_sdk/utilities/protocol_detector.hpp"
+
+using namespace westonrobot;
+
+int main(int argc, char **argv) {
+  ProtocolDetector detector;
+  if (detector.Connect("can0")) {
+    auto proto = detector.DetectProtocolVersion(5);
+
+    if (proto == ProtocolVersion::AGX_V1) {
+      std::cout << "Detected protocol: AGX_V1" << std::endl;
+    } else if (proto == ProtocolVersion::AGX_V2) {
+      std::cout << "Detected protocol: AGX_V2" << std::endl;
+    } else {
+      std::cout << "Detected protocol: UNKONWN" << std::endl;
+    }
+  } else {
+    std::cout << "Failed to open port" << std::endl;
+    return -1;
+  }
+
+  return 0;
+}