fix(glossy): fix forward linking (broken themes)

Fixes [#19](https://github.com/swaits/typst-collection/issues/19).

Themes must emit `entry.label` for terms to be able to forward-link to
their glossary entrie.

glossy/src/themes/academic.typ

@@ -40,7 +40,7 @@
           grid(
             columns: (1fr, auto),
             gutter: 0.75em,
-            [#short-display#long-display#description],
+            [#short-display#long-display#description#entry.label],
             text(fill: rgb("#666666"), entry.pages)
           )
         }

glossy/src/themes/chicago-index.typ

@@ -37,7 +37,7 @@
           grid(
             columns: (1fr, auto),
             gutter: 1em,
-            [#short-display#entry.label#long-display#description],
+            [#short-display#entry.label#long-display#description#entry.label],
             [#entry.pages]
           )
         }

glossy/src/themes/table.typ

@@ -27,6 +27,6 @@
   },
 
   entry: (entry, index, total) => {
-    (entry.short, entry.long, entry.description, entry.pages)
+    (entry.short + entry.label, entry.long, entry.description, entry.pages)
   }
 )