add omarchy tweaks

[landsman]

Changes:

• install hyprland plugins: https://github.com/hyprwm/hyprland-plugins
• enable https://github.com/hyprwm/hyprland-plugins/tree/main/hyprexpo#readme, map it to SUPER+Z
• install https://github.com/Duckonaut/split-monitor-workspaces and enable split-monitor-workspaces