for users who do not utilize any form of "workspace prev/next" commands,
it can be very handle to sort the workspaces alphabetically.
this commit adds a new "alphabetical_sort" to the `sway/workspaces`
module which allows the module to alway sort workspaces alphabetically.
this docs are updated to warn the user of the implications involved.
Signed-off-by: Louis DeLosSantos <louis.delos@gmail.com>