All menu switching commands (`switch-window`, `switch-workspace`, and
`switch-workspace-or-window`) can now create and switch to not yet existing
workspaces. Just type a digit, a name, or `<digit>:<name>`, confirm your
input, and it'll do. The `<digit>:<name>` format is explained in `man
sway(5)`. If that format is given, `swayr` will create the workspace using
`workspace number <digit>:<name>`. If just a digit or name is given, the
`number` argument is not used.