Added --run-command option, obsoletes --wrapper

[Hritik14]

Wrapper was an idea exclusively useful for running the binary via i3-exec.
While that is of utmost importance, the current --run-command feature subsets wrapper and a lot more.

The current syntax is

           --run-command "/usr/bin/anybinary {}"

The --wrapper could be replaced with a similar structure

           --run-command "wrapper_binary '{}'"`

I strongly advocate for --run-command and obsolete --wrapper as it is way more awesome and flexible. The idea was directly inspired by rofi's -run-command

[Hritik14]

--wrapper is still present for backwards compatibility, though I intend to either

1. completely remove --wrapper cmd
2. make it an alias to --run-command "cmd ''"

[Hritik14]

Hi @enkore, is there any update on the PR ?