docs: dd example of UI indicators with nerd-icons.el

Author: larrasket

README.org

@@ -252,6 +252,48 @@ Here's an example indicator definition incorporating icons:
 
 Keep in mind, however, the included predicate functions must be performance-optimized, since the completion UI runs them on your entire library every time you open it.
 
+**** With [[https://github.com/rainstormstudio/nerd-icons.el][nerd-icons]] (for doom users too)
+
+[[file:images/indicators-nerd-icons.png]]
+
+Nerd-icons.el is a library for easily using Nerd Font icons inside Emacs, an alternative to all-the-icons, and it is the icon package that already included in [[https://github.com/doomemacs/doomemacs][Doom Emacs]]. Here's an example of getting a similar look with it:
+
+#+begin_src emacs-lisp
+(defvar citar-indicator-notes-icons
+  (citar-indicator-create
+   :symbol (nerd-icons-mdicon
+            "nf-md-notebook"
+            :face 'nerd-icons-blue
+            :v-adjust -0.3)
+   :function #'citar-has-notes
+   :padding "  "
+   :tag "has:notes"))
+
+(defvar citar-indicator-links-icons
+  (citar-indicator-create
+   :symbol (nerd-icons-octicon
+            "nf-oct-link"
+            :face 'nerd-icons-orange
+            :v-adjust -0.1)
+   :function #'citar-has-links
+   :padding "  "
+   :tag "has:links"))
+
+(defvar citar-indicator-files-icons
+  (citar-indicator-create
+   :symbol (nerd-icons-faicon
+            "nf-fa-file"
+            :face 'nerd-icons-green
+            :v-adjust -0.1)
+   :function #'citar-has-files
+   :padding "  "
+   :tag "has:files"))
+
+(setq citar-indicators
+  (list citar-indicator-files-icons
+        citar-indicator-notes-icons
+        citar-indicator-links-icons))
+#+end_src
 ** Test Script
     :PROPERTIES:
     :CUSTOM_ID: test-script