Add private browser key binding (#1324)

* Add private browser key binding

* Include other Firefox-based browsers

* Simplify implementation

* Add migration to add the hotkey

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Co-authored-by: David Heinemeier Hansson <david@hey.com>

config/hypr/bindings.conf

@@ -5,6 +5,7 @@ $browser = omarchy-launch-browser
 bindd = SUPER, return, Terminal, exec, $terminal --working-directory="$(omarchy-cmd-terminal-cwd)"
 bindd = SUPER, F, File manager, exec, uwsm app -- nautilus --new-window
 bindd = SUPER, B, Browser, exec, $browser
+bindd = SUPER SHIFT, B, Browser (private), exec, $browser --private
 bindd = SUPER, M, Music, exec, uwsm app -- spotify
 bindd = SUPER, N, Neovim, exec, $terminal -e nvim
 bindd = SUPER, T, Activity, exec, $terminal -e btop