Line breaking tests ✅

Co-Authored-By: Martin <mhaug@live.de>

tests/typ/text/linebreaks.typ

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+// Test line breaking.
+
+---
+// Test normal line breaking.
+But, soft! what light through yonder window breaks? It is the east, and Juliet
+is the sun. Arise, fair sun, and kill the envious moon, Who is already sick and
+pale with grief hard.
+
+// From Wikipedia:
+#font("Noto Serif CJK SC")
+是美国广播公司电视剧《迷失》第3季的第22和23集，也是全剧的第71集和72集
+由执行制作人戴蒙·林道夫和卡尔顿·库斯编剧，导演则是另一名执行制作人杰克·本德
+节目于2007年5月23日在美国和加拿大首播，共计吸引了1400万美国观众收看
+本集加上插播广告一共也持续有两个小时
+
+---
+// Test hard break directly after normal break.
+But, soft! What light through \ yonder window breaks?
+
+---
+// Test consecutive breaks.
+But, soft! Whatlightdoyoueveryonderthrough window breaks? Why did the window
+even \ break \ \ in the first place.
+
+---
+// Test two superlong words in a row.
+Supercalifragilisticousalogy Expialigoricmetrioxidationreagent.
+
+---
+// Test run change after space.
+Left #font("PT Sans")[Right].
+
+---
+// Test trailing newline.
+Trailing newline{"\n"}