Added Idle Inhibitor Features: Signal Inputs & Activity Detection

[guttermonk]

Added two features:

1. Signal input to toggle idle_inhibitor on and off.
   Fixes: Deactivate idle inhibitor programmatically #690

2. Activity Detection - bool that defaults to false, but when set to true:

   • stays on while keyboard or mouse activity is detected
   • when no input is detected for the duration of the timeout, the idle_inhibitor will turn off

Example config:

"idle_inhibitor": {
  "format": "{icon}",
  "format-icons": {
    "activated": "",
    "deactivated": ""
  },
  "signal": 6,
  "start-activated": true,
  "timeout": 2,
  "tooltip": true,
  "tooltip-format": "Caffeine: {status}",
  "tooltip-format-activated": "Caffeine {status}",
  "tooltip-format-deactivated": "Caffeine {status}",
  "wait-for-activity": true
},