Optionally respect minimum sizes of windows on the resize command

[vikanezrimaya]

• Description:
  Some clients can specify minimum sizes on windows with the xdg_toplevel::set_min_size call, and while it is stated the compositor is not obligated to honor the request, it may do so.

  The reasonable minimum size seems to be respected on mouse resizes with the floating_modifier held, but the resize command gets no such treatment. It could be useful to either make this the default behavior, or add a per-invocation or a global flag to do so.

[sahinf]

I'd like this as well. I think #6842 adds this functionality but I don't know why it hasn't been merged.