Add a mappable version of existing :reflow command

[jw013]

#2128 added the reflow command but I found I was not able to bind any keys to it because it was only added in the command (:) mode. This change adds a mappable command to call the existing reflow function. When used as a keymap, the count is used as the text width, with a missing or zero count triggering the existing original fallback default logic. This change does not set a default keybinding for the new reflow command to leave that decision up for discussion. I use Alt-q myself.

[robinvd]

you should be able to bind it using this syntax

[keys.normal]
q = ":reflow"

[jw013]

Thanks, not sure how I missed that. There is one benefit of a dedicated normal mode command which is that a text-width argument can be specified using the count. So e.g. 99q would run the equivalent of :reflow 99 and 80q would do :reflow 80, etc.

[the-mikedavis]

With #6979 and some extra work we could add a %val{count} expansion that would cover that use-case. I don't want to have to add non-typable versions of any typable commands to work around functionality issues with keybinding