Add the `swaymsg` flag to launch a program with `swaymsg exec` and prevent potential involuntary closing with Jetbrains IDEs

[gouvinb]

Description

This pull request adds the swaymsg flag to the nwg-drawer command to launch a program with the swaymsg exec command. This prevents potential unintentional closure with Jetbrains IDEs.

Advantages

• Prevents unintentional closing of programs launched with no swaymsg exec and no terminal
• Improves stability of Jetbrains IDEs

Instructions

To use this new feature, simply add the -swaymsg flag to the nwg-drawer command, or set the XDG_CURRENT_DESKTOP environment variable to "sway".

Example

Before

rubymine # without -term, -swaymsg and without XDG_CURRENT_DESKTOP=sway

After

swaymsg exec firefox # with -swaymsg or with XDG_CURRENT_DESKTOP=sway

[nwg-piotr]

Looks good, thank you.

For feature parity we should also have nwg-drawer -hyprctl -> hyprctl dispatch exec <command>.