Update Modus themes to version 4 and add new themes

Update Modus themes to version 4 and add new themes

* etc/NEWS: Document the addition of four new Modus themes.

* doc/misc/modus-themes.org: Update the manual.

* etc/themes/modus-operandi-deuteranopia-theme.el:
* etc/themes/modus-operandi-theme.el:
* etc/themes/modus-operandi-tinted-theme.el:
* etc/themes/modus-vivendi-deuteranopia-theme.el:
* etc/themes/modus-vivendi-theme.el:
* etc/themes/modus-vivendi-tinted-theme.el: Add theme files.

* etc/themes/modus-themes.el: Update main file to the latest version.

Detailed release notes here:
<https://protesilaos.com/codelog/2023-01-01-modus-themes-4-0-0/>.

The inclusion of the four new Modus themes was discussed on
emacs-devel:
<https://lists.gnu.org/archive/html/emacs-devel/2022-12/msg00834.html>.