execute multiple actions in a single bind

[Fuann-Kinoko]

usage:
execute multiple actions, just for convenience

for example

 Mod+Shift+Comma  { consume-window-into-column; consume-window-into-column; }
 Mod+Z {
       focus-column-last
       spawn "pkill" "-SIGUSR1" "-o" "waybar"
 }

Right now niri only takes the first action within bind, but it is easy to extend it to a Vec and do multiple actions sequentially.

niri/src/input.rs

Line 1488 in 2b5eeb6

return bind.actions.first().cloned();

However I'm not sure what if multiple actions are trigger in screenshot mode, and some actions are valid like quit, while others are not. Should the valid actions be executed and others get ignored? Or don't do anything if it contains non-screenshot actions?

niri/src/input.rs

Lines 1393 to 1405 in 2b5eeb6

	if screenshot_ui.is_open() {
	let mut use_screenshot_ui_action = true;
	if let Some(action) = &final_action {
	if allowed_during_screenshot(action) {
	use_screenshot_ui_action = false;
	}
	}
	if use_screenshot_ui_action {
	final_action = screenshot_ui.action(raw, mods);
	}
	}

Additionally, I'm not certain if it's necessary to include a "safety check" to prevent potentially conflicting actions.

If this feature is considered acceptable, I'm willing to submit a pull request.

[YaLTeR]

I'm not yet sure how/if I want to allow multiple actions per bind. For now you can work around by binding spawing a script that uses niri msg action.