Emacs Org Mode Site: Open External Links in new tab - emacs

Question

I'm in the process of remaking my website so that I can write the content of my website in org files.
I would like that external links would be opened in a new tab, but internal links, such as those in the automatically generated table of contents, must not.
I'd rather avoid having to resort to the following kind of solution:
+
#+BEGIN_EXPORT html
Site
#+END_EXPORT
+
#+BEGIN_EXPORT html
Repo
#+END_EXPORT
I'd really prefer that I could create links the usual org mode way.
Does anyone know of a way to do this? Thank you.
P.S. I suspect this isn't very relevant but, in case it clarifies anything, I'm building my site using this code in a .el file:
(require 'package)
(setq package-user-dir (expand-file-name "./.pakages"))
(setq package-archives '(("melpa" . "https://melpa.org/packages/")
("elpa" . "https://elpa.gnu.org/packages/")))
;; Initialize the package system
(package-initialize)
(unless package-archive-contents
(package-refresh-contents))
;; Install dependencies
(package-install 'htmlize)
;; Load the publishing system
(require 'ox-publish)
(setq org-html-validation-link nil ;; Don't show validation link
org-html-head-include-spcript nil ;; Use our own scripts
org-html-head-include-default-style nil) ;; Use our own styles
;; org-html-head "<link rel=\"stylesheet\" href=\"https://cdn.simplecss.org/simple.min.css\" />")
(defun read-file (filename)
(save-excursion
(let ((new (get-buffer-create filename)) (current (current-buffer)))
(switch-to-buffer new)
(insert-file-contents filename)
(mark-whole-buffer)
(let ((contents (buffer-substring (mark) (point))))
(kill-buffer new)
(switch-to-buffer current)
contents))))
;; Define the publishing project
(setq org-publish-project-alist
(list
(list "org-pages"
:recursive nil
:base-directory "./content"
:base-extension "org"
:publishing-directory "./public"
:publishing-function 'org-html-publish-to-html
:exclude ".*\~"
:with-author nil ;; Don't include author name
:with-creator nil ;; Don't include Emacs and Org versions in footer
:with-toc nil ;; Include table of contents
:section-numbers nil ;; Don't include section numbers
:time-stamp-file nil ;; Don't include time stamp in file
:html-preamble (read-file "./layout/preamble.html")
:auto-sitemap nil)
(list "blog-content"
:recursive t
:base-directory "./content/blog"
:base-extension "org"
:publishing-directory "./public/blog"
:publishing-function 'org-html-publish-to-html
:exclude ".*\~"
:with-author nil ;; Don't include author name
:with-creator nil ;; Don't include Emacs and Org versions in footer
:with-toc t ;; Include table of contents
:section-numbers nil ;; Don't include section numbers
:time-stamp-file nil ;; Don't include time stamp in file
:html-preamble (read-file "./layout/preamble.html")
:auto-sitemap t
:sitemap-filename "blog-archive.org"
:sitemap-title "Blog Posts"
:sitemap-sort-files 'anti-chronologically
:sitemap-style 'list)
(list "static"
:recursive t
:base-directory "./content"
:exclude ".*\~"
:base-extension "css\\|js\\|html\\|png\\|jpg\\|svg\\|webp\\|gif\\|pdf\\|mp3\\|ogg\\|swf"
:publishing-directory "./public"
:publishing-function 'org-publish-attachment)
))
;; Generate the site output
(org-publish-all t)
(message "Build complete!")