feat(glossy): add case-insensitive sorting

preview/glossy/0.2.1/README.md

@@ -154,8 +154,9 @@ Display the glossary using the `glossary()` function:
 
 ```typst
 #glossary(
-  title: "Web Development Glossary",
-  theme: my-theme,
+  title: "Web Development Glossary", // Optional: defaults to Glossary
+  theme: my-theme, // Optionaal: defaults to theme-twocol
+  ignore-case: false, // Optional: ignore case when sorting terms
   groups: ("Web")  // Optional: Filter to specific groups
 )
 ```

preview/glossy/0.2.1/src/gloss.typ

@@ -390,7 +390,8 @@
 #let glossary(
   title: "Glossary",
   theme: theme-twocol,
-  groups: ()
+  ignore-case: false,
+  groups: (),
 ) = context {
   // Collect and organize entries by group
   let output = (:)
@@ -437,10 +438,18 @@
   // Add non-empty groups to output
   if current_entries.len() > 0 {
     group = if group == none { "" } else { group }
-    output.insert(
-      group,
-      current_entries.sorted(key: e => e.short)
-    )
+
+    // sort entries by case insensitivity if requested
+    let sorted_entries = current_entries
+      // 1. create array of tuples with (lower [if ignore-case], entry)
+      .map(e => { if ignore-case { (lower(e.short), e) } else { (e.short, e) } })
+      // 2. sort the tuples (by first element then second)
+      .sorted(key: t => t.first())
+      // 3. strip away the tuple's first element, leaving an array of entries
+      .map(t => t.last())
+
+    // add entries to this group's output map
+    output.insert(group, sorted_entries)
   }
 }