Add org-plot configuration

Thanks to the newly merged patches, we can do some nice configuration :)

config.org

@@ -5311,6 +5311,81 @@ There's also this lovely equation numbering stuff I'll nick
   (advice-add 'org-create-formula-image :around #'scimax-org-renumber-environment)
   (put 'scimax-org-renumber-environment 'enabled t))
 #+end_src
+**** Org Plot
+We can use some of the variables in =org-plot= to use the current doom theme
+colours.
+#+begin_src emacs-lisp
+(after! org-plot
+  (defun org-plot/generate-theme (_type)
+    "Use the current Doom theme colours to generate a GnuPlot preamble."
+    (format "
+fgt = \"textcolor rgb '%s'\" # foreground text
+fgat = \"textcolor rgb '%s'\" # foreground alt text
+fgl = \"linecolor rgb '%s'\" # foreground line
+fgal = \"linecolor rgb '%s'\" # foreground alt line
+
+# foreground colors
+set border lc rgb '%s'
+# change text colors of  tics
+set xtics @fgt
+set ytics @fgt
+# change text colors of labels
+set title @fgt
+set xlabel @fgt
+set ylabel @fgt
+# change a text color of key
+set key @fgt
+
+# line styles
+set linetype 1 lw 2 lc rgb '%s' # red
+set linetype 2 lw 2 lc rgb '%s' # blue
+set linetype 3 lw 2 lc rgb '%s' # green
+set linetype 4 lw 2 lc rgb '%s' # magenta
+set linetype 5 lw 2 lc rgb '%s' # orange
+set linetype 6 lw 2 lc rgb '%s' # yellow
+set linetype 7 lw 2 lc rgb '%s' # teal
+set linetype 8 lw 2 lc rgb '%s' # violet
+
+# palette
+set palette maxcolors 8
+set palette defined ( 0 '%s',\
+1 '%s',\
+2 '%s',\
+3 '%s',\
+4 '%s',\
+5 '%s',\
+6 '%s',\
+7 '%s' )
+"
+            (doom-color 'fg)
+            (doom-color 'fg-alt)
+            (doom-color 'fg)
+            (doom-color 'fg-alt)
+            (doom-color 'fg)
+            ;; colours
+            (doom-color 'red)
+            (doom-color 'blue)
+            (doom-color 'green)
+            (doom-color 'magenta)
+            (doom-color 'orange)
+            (doom-color 'yellow)
+            (doom-color 'teal)
+            (doom-color 'violet)
+            ;; duplicated
+            (doom-color 'red)
+            (doom-color 'blue)
+            (doom-color 'green)
+            (doom-color 'magenta)
+            (doom-color 'orange)
+            (doom-color 'yellow)
+            (doom-color 'teal)
+            (doom-color 'violet)
+            ))
+  (defun org-plot/gnuplot-term-properties (_type)
+    (format "background rgb '%s' size 1050,650"
+            (doom-color 'bg)))
+  (setq org-plot/gnuplot-script-preamble #'org-plot/generate-theme)
+  (setq org-plot/gnuplot-term-extra #'org-plot/gnuplot-term-properties))
 #+end_src
 **** Exporting (general)
 #+begin_src emacs-lisp