Support for disabling/enabling PD after setup

[sidcha]

To give the feeling of PD hot-plug, we will add a new CP API that allows the app to disable/enable a PD managed by that CP.

• By default all PDs would be enabled to retain existing behaviour
• When a PD is disabled, it must be brought to a safe state before letting it idle
• When a PD is enabled, it starts up as it would during setup
• Commands/Events should not work for disabled PDs

Discussed in https://github.com/goToMain/libosdp/discussions/183

^{Originally posted by MLastAirBender June 10, 2024} Is there any way to increase the multi drop client from 2 to 4 during run time? I don't want to reset or stop the things which are running but want to increase the number of readers on the same port.