Add StatusPlugin to dynamically check a script's or website's output and change the button text+background color based on result

[bgrande]

Multiple possibilities:

1. run a script per button press or periodically
2. call a website per button press or periodically
3. change button text and background color based on the result
   3.1 Based on Status (i.e. 200)
   3.2 Based on Success (no error)
   3.3 Based on Contains (a string like hello)
   3.4 Based on Equals (a string like hello)
   3.5 Based on a regex (like hello .*)

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