AK: Add a comparison operator for Utf32View

(cherry picked from commit 0703ba118b56aaa924346ae36c8826764dadd409)

AK/Utf32View.cpp

@@ -27,6 +27,14 @@ Optional<u32> Utf32CodePointIterator::peek(size_t offset) const
     return *new_iterator;
 }
 
+bool Utf32View::operator==(Utf32View const& other) const
+{
+    ReadonlySpan<u32> code_points { m_code_points, m_length };
+    ReadonlySpan<u32> other_code_points { other.m_code_points, other.m_length };
+
+    return code_points == other_code_points;
+}
+
 ErrorOr<void> Formatter<Utf32View>::format(FormatBuilder& builder, Utf32View const& string)
 {
     return builder.builder().try_append(string);

AK/Utf32View.h

@@ -119,6 +119,8 @@ public:
         return substring_view(offset, length() - offset);
     }
 
+    bool operator==(Utf32View const& other) const;
+
 private:
     u32 const* begin_ptr() const
     {