[cpp][tiny] rename generator, update samples (#9560)

* rename generator, update samples

* add doc

* update readme

samples/client/petstore/cpp-tiny/lib/Models/Helpers.cpp

@@ -0,0 +1,102 @@
+#include "Helpers.h"
+#include <string>
+#include <sstream>
+
+bool isprimitive(std::string type){
+	if(type == "std::string" ||
+		type == "int" ||
+		type == "float" ||
+		type == "long" ||
+		type == "double" ||
+		type == "bool" ||
+		type == "std::map" ||
+		type == "std::list")
+    {
+		return true;
+	}
+	return false;
+}
+
+
+void
+jsonToValue(void* target, bourne::json value, std::string type)
+{
+	if (target == NULL || value.is_null()) {
+		return;
+	} 
+    
+    else if (type.compare("bool") == 0) 
+    {
+		bool* val = static_cast<bool*> (target);
+		*val = value.to_bool();
+	} 
+    
+    else if (type.compare("int") == 0) 
+    {
+		int* val = static_cast<int*> (target);
+		*val = value.to_int();
+	} 
+    
+    else if (type.compare("float") == 0) 
+    {
+		float* val = static_cast<float*> (target);
+		*val = (float)(value.to_float());
+	} 
+
+    else if (type.compare("long") == 0)
+    {
+        long* val = static_cast<long*> (target);
+		*val = (long)(value.to_int());
+    } 
+    
+    else if (type.compare("double") == 0) 
+    {
+		double* val = static_cast<double*> (target);
+		*val = value.to_float();
+	} 
+    
+    else if (type.compare("std::string") == 0) 
+    {
+		std::string* val = static_cast<std::string*> (target);
+		*val = value.to_string();
+    }
+	else {
+		return;
+	}
+}
+
+std::string
+stringify(long input){
+    std::stringstream stream;
+    stream << input;
+    return stream.str();
+
+};
+
+std::string
+stringify(int input){
+    std::stringstream stream;
+    stream << input;
+    return stream.str();
+};
+
+std::string
+stringify(double input){
+    std::stringstream stream;
+    stream << input;
+    return stream.str();
+};
+
+std::string
+stringify(float input){
+    std::stringstream stream;
+    stream << input;
+    return stream.str();
+};
+
+std::string
+stringify(std::string input){
+    std::stringstream stream;
+    stream << input;
+    return stream.str();
+};