Add idle inhibition status in a swaymsg command response

[tardypad]

Here is my use case: I'd like to display in the status bar whether the idle state is currently inhibited or not (given the current state of the tree).

However, at the moment, the idle info is nowhere to be found in any of the swaymsg command response.

There are several options I could think of to add this info:

• Add a new command like swaymsg -t get_idle_status or so that would directly return whether it is inhibited as a whole or not.

• In the get_tree response add a new "inhibit_idle" key for containers that would store a boolean.

• Same as previous option but make the "inhibit_idle" key contain any of the possible values ("focus", "fullscreen", "none",...) it was set with.

All those options should make some scripting possible around this idle info.

[tardypad]

Linking a comment I found related to this #4945 (comment)

[emersion]

Idle inhibition is tied to surfaces. I think it'd make sense to add idle inhibition status to the get_tree reply.