Implement layer_shell_v1

[OctopusET]

Closes #95

It only works with basic things yet

You can try test with like this

./cage layer-shell -- -l top # https://gitlab.freedesktop.org/wlroots/wlr-clients/-/blob/master/layer-shell.c

or

./cage wlgreet

[OctopusET]

I will start work again after #313 is merged

[septatrix]

I will start work again after #313 is merged

As this is merged, what is the current status of this PR?

[OctopusET]

I've been busy for a while, I think I will be able to restart work at December

[OctopusET]

Just rebasing

[septatrix]

I've been busy for a while, I think I will be able to restart work at December

Any new status updates you might be able to provide? :)

[OctopusET]

@septatrix I think now I'm really free. I just started some work. But I will finish other open source work first.

[OctopusET]

Found a issue why it's crashing

[ 517703.732] wl_surface#11.frame(new id wl_callback#14)
[ 517703.763] wl_surface#11.frame(new id wl_callback#19)
[ 517703.819] wl_surface#11.attach(wl_buffer#22, 0, 0)
[ 517703.836] wl_surface#11.damage(0, 0, 2147483647, 2147483647)
[ 517703.857] wl_surface#11.commit()

wl_surface#11.damage(0, 0, 2147483647, 2147483647)

[figuldan]

What is the state of this PR? Any new updates?

[SpieringsAE]

Would also love to see this for on screen keyboards

[OctopusET]

Sorry, I've been busy with other things (again...)
I don't think I can work on this in the near future.

[OctopusET]

I got some free time for some weeks, let me try some.

[OctopusET]

@emersion now it's ready to be reviewed