cmd_assign
cmd_assign

This implements cmd_assign. Basically a copy and paste from
cmd_for_window however it has → handling and injects a `move container to
workspace`

taiyu-len/sway,ascent12/sway,colemickens/sway,mikkeloscar/sway,mikkeloscar/sway,ascent12/sway,crondog/sway,colemickens/sway,taiyu-len/sway,sleep-walker/sway,johalun/sway,taiyu-len/sway,ptMuta/sway,crondog/sway,ascent12/sway,1ace/sway,4e554c4c/sway,colemickens/sway,1ace/sway,4e554c4c/sway,SirCmpwn/sway,sleep-walker/sway,1ace/sway