runtime(misc): use :hor :term to ensure new term window is split horizontally

runtime(misc): use :hor :term to ensure new term window is split horizontally

Problem:  :term splits new window above in vim, but in nvim it change
          the buffer for current window
Solution: :hor term to ensure consistent splitting for Vim and Neovim

closes: #17822

Signed-off-by: phanium <91544758+phanen@users.noreply.github.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>