Set rules for gloss

Doesn't currently work, see https://github.com/typst/typst/issues/147

new-example.typ

@@ -0,0 +1,16 @@
+#import "leipzig-gloss.typ": gloss, numbered_gloss, gloss_count
+
+#set gloss(header_text_style: text(color: "blue"))
+
+= Saimiar
+
+#let sc = smallcaps
+
+From the song Tetrachromacy (_xoikesêcuxasø_) by King Gizzard.
+
+#gloss(
+    header_text: [vath sêcubai dhiakŋo, somyxasan krexasir êsuŋo],
+    source_text: ([vath], [sêcu-bai], [dhika-ŋo], [so-my-xas-an], [kre-xas-ir], [êsu-ŋo]),
+    morphemes: ([three], [color-#sc[1sg]:#sc[pos]], [divide-#sc[cop]], [#sc[all]-un-see-#sc[nom]], [#sc[pot]-see-#sc[nom]], [desire-#sc[cop]]),
+    translation: [my three shades are divisible, lust to see the invisible],
+)