AK: Allow constructing Utf32 from a span of u32

Author: https://github.com/trflynn89
Commit: cf9693169c
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/1861

AK/Utf32View.h

@@ -71,6 +71,11 @@ public:
         VERIFY(code_points || length == 0);
     }
 
+    Utf32View(ReadonlySpan<u32> code_points)
+        : Utf32View(code_points.data(), code_points.size())
+    {
+    }
+
     Utf32CodePointIterator begin() const
     {
         return { begin_ptr(), m_length };