docs(icon-description): added old and empty tags/use case for ghost (#4762)

* chore: added old and empty tags/use case for ghost

* chore: added dead use-case

Co-authored-by: Karsa <contact@karsa.org>

* chore: applied tags

Co-authored-by: Karsa <contact@karsa.org>

---------

Co-authored-by: Karsa <contact@karsa.org>

icons/ghost.json

@@ -9,6 +9,7 @@
     "Representing Halloween themes in seasonal content",
     "Indicating spooky or haunted themes",
     "Marking invisible or hidden states in playful UIs",
+    "Indicating dead links or obsolete content",
     "Showing ghosts or spirits in arcade-style games"
   ],
   "tags": [
@@ -23,7 +24,15 @@
     "shadow",
     "silhouette",
     "pac-man",
-    "spooky"
+    "spooky",
+    "halloween",
+    "haunted",
+    "invisible",
+    "hidden",
+    "empty",
+    "dead",
+    "obsolete",
+    "outdated"
   ],
   "categories": [
     "gaming"