Parse UserActivity message for AFK detection

[DeinFreund]

The wrapper sends a message UserActivity with member IdleSeconds every 5 seconds. This should be parsed by Chobby and used to update the idle time if IdleSeconds is smaller than chobby's self detected idle time.

[Licho1]

There is already ticket for it and there is already code in old ZKL to detect user activity on OS level for both win and linux.

[DeinFreund]

I haven't seen any concrete loopback message for transmitting afk status yet. Could you link it?

[Licho1]

There was no message but there was code to detect AFK status in old ZKL. Code that worked on both linux and win

[Histidine91]

Needed before next infra stable (otherwise it spams error messages while ingame)

[f=0000331] [Chobby] Error: No such function: UserActivity, for command: UserActivity {"IdleSeconds":0.031}

[DeinFreund]

There's an empty handler now 9084b01#diff-b90de4c81572bbc4f09861f1d44d87ea that just needs to be implemented.