Add '--dmenu' Option to Output Nerd-Converted Keybinds for Use in Rofi/Dmenu

[ry2x]

I would like to add a new option, --dmenu, to HyprBind that outputs keybindings as strings after they have been converted to their Nerd equivalents. This feature will allow the keybindings to be used directly with utilities such as Rofi or dmenu.

Feature details:

• Add a hyprbind --dmenu option to output keybindings as plain strings after Nerd conversion.
• The output format should be suitable for consumption by Rofi, dmenu, or similar launchers.
• This will make it easier for users to browse or select keybindings interactively using those tools.

Use case:
This will help users to quickly view or select keybindings in an interactive menu powered by Rofi or dmenu, enhancing HyprBind's usability in different workflows.