24 value converter

[SmySmy]

Closes #

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[huebl]

ToDo:

convert value with conversion context in function:

• PiXtendBaseServer::readValue
• PiXtendBaseServer::writeValue
• PiXtendBaseServer::receiveMonotoredItemStart (In lambda and at the end)

[huebl]

After creating a monitored item, the assigned opc ua variable must be set immediately. A unit conversion is also necessary at this point.

https://github.com/ASNeG/OpcUaPiXtendServer/blob/24_value_converter/src/OpcUaPiXtendServer/OpcUaServer/PiXtendBaseServer.cpp#L356