Feature Request: CEC control

[mishoboss]

Would be really great if we can control screen ON/OFF via CEC.

Triggers:

• On mouse move
• On keyboard press
• On touchscreen touch
• On HTTP endpoint request (see Feature Request: HTTP endpoints #46)

[Salamek]

Partially implemented by idle/active events in websocket control #63

[Salamek]

CEC commands to turn screen on/off on supported devices (RPI etc):

echo "0x40 0x04" > /sys/class/cec/cmd   # ON
echo "0x40 0x36" > /sys/class/cec/cmd   # OFF

This will most likely not be implemented directly into chromium-kiosk/qiosk but only as code example listening to correct events of qiosk websocket api in #63 ... (or maybe as disabled preinstalled service?)