refactor: remove attachments from outline

examples/qualification-thesis/main.typ

@@ -69,15 +69,15 @@
   ),
   attachments: (
     attachment(
-      caption: "foo",
-      label: <foo>,
+      caption: "Attachment table",
+      label: <table-1>,
       table(
         columns: (1fr, 1fr),
         [foo], [bar],
       ),
     ),
     attachment(
-      caption: "bar",
+      caption: "Another table",
       table(
         columns: (1fr, 1fr),
         [foo], [bar],

src/lib.typ

@@ -269,7 +269,6 @@
     depth: 3,
     indent: indent,
     title: text(size: 14pt, outline-title),
-    target: heading.where().or(figure.where(kind: "attachment")),
   )
 
   // Display the paper's contents.