Add support for monitoring specific processes

[Porges]

Add a new commandline parameter which is a comma-separated list of process names to monitor. Stats for CPU and memory of these processes will be sent alongside the other metrics.

[timotheeguerin]

Can you also add docs to the readme on how to use this setting

[Porges]

Updated docs.

[timotheeguerin]

On windows you also need to update the run-windows.ps1 because of the way it starts background tasks environment variables are not passed through so they have to be converted to cli args

[Porges]

@timotheeguerin yes, that's why I wrote "this will require modifying the appropriate run script". Do you think I should be more explicit?

[timotheeguerin]

Oh I see, any reason why you wouldn't change it here? Feel like this is an unnecessary step for users

[Porges]

Right, easy enough 🙂