New option: rconsole_pos

[jalvesaq]

Close #598

[jalvesaq]

Although we are in a freeze period, this new option was necessary to fix a bug in the documentation and restore a feature of Vim-R (previously known as Nvim-R).

The rconsole_pos works for the built-in terminal and for WezTerm.

For Tmux split, the user has to set the tmux command. Hence, it's up to the user to add the -b parameter to get a split pane on the left or above the current one. For Kitty split, I didn't find a parameter to control the position of the new window.

[PMassicotte]

All good on my side; tested and worked perfectly; thank you! Maybe just add the missing rconsole_pos anchor in 6.14?

[PMassicotte]

Should this also be added in 6.14? Along with

rconsole_height
rconsole_width
rconsole_pos
min_editor_width

[jalvesaq]

I'll add it...

[PMassicotte]

Thank you very much!