[Feature] dmenu mode

[explosion-mental]

A simple wrapper that understands dmenu flags and interprets them as tofi flags (when possible, else just ignore them) would be so useful when using alrd made scripts. With this change dmenu scripts won't need modification on them (simply make a script called dmenu with tofi --dmenu true "$@"), unless ofc if they are using some patch (which I think should be silently ignore rather than failling).

Maybe there is a better way to handle flags like accepting a string like --dmenu "-p 'Hello World' -l 15" or even just ship a tofi-dmenu bin for this.

ofc that having this wrapper would make it a "drop in replacement" for dmenu c: