[feat] Global Shortcut support on Wayland

[wusyong]

Describe the problem

Global Shortcut on Linux only works on x11 because wayland-protocols hasn't define anything yet.
There's a RFC about this.

Describe the solution you'd like

While we can use some workaround or implement one our own, it won't be supported by all DEs.
We'll have to wait wayland decide to add this.

Alternatives considered

No response

Additional context

Tracking issue in tao: tauri-apps/global-hotkey#28

[jokeyrhyme]

• there's a new GlobalShortcuts portal API: https://flatpak.github.io/xdg-desktop-portal/#gdbus-org.freedesktop.portal.GlobalShortcuts
• when an tauri consumer calls globalShortcut functions ( https://tauri.app/v1/api/js/globalShortcut ) they should transparently attempt to interact with xdg-desktop-portal via DBus (when available)
• this way, app developers do not need to make any other changes to their code (besides updating the version of tauri they use)

These Linux desktop environments have already implemented the GlobalShortcuts portal:

• Hyprland: https://github.com/hyprwm/xdg-desktop-portal-hyprland/blob/2bdadd2d37f42b516587c64c963ea638c6df8355/hyprland.portal#L3
• KDE: https://invent.kde.org/plasma/xdg-desktop-portal-kde/-/blob/faf620bae9a6601e5380de96ceebce63bc7a062d/data/kde.portal#L3

These are tracking issues/discussions for other desktop environments:

• COSMIC: feature request: GlobalShortcuts portal pop-os/xdg-desktop-portal-cosmic#4
• GNOME: https://gitlab.gnome.org/GNOME/xdg-desktop-portal-gnome/-/issues/47
• wlroots (for sway/river and others): Global shortcut portal support emersion/xdg-desktop-portal-wlr#240

[benbot]

Is this currently supported on KDE plasma? In the latest version of tauri, it doesn't seem like my global shortcuts work.