add operator<< for packets (#14)

Reviewed-on: #14
Co-authored-by: Persson-dev <sim16.prib@gmail.com>
Co-committed-by: Persson-dev <sim16.prib@gmail.com>

src/sp/common/VarInt.cpp

@@ -49,4 +49,8 @@ DataBuffer& operator>>(DataBuffer& in, VarInt& var) {
 	return in;
 }
 
+std::ostream& operator<<(std::ostream& a_Stream, const PrintableField<VarInt>& a_VarInt) {
+	return a_Stream << a_VarInt.GetValue().GetValue();
+}
+
 }  // namespace sp