Add support for the <strike> tag in the attributed string builder

ElementX/Sources/Other/HTMLParsing/AttributedStringBuilder.swift

@@ -185,7 +185,7 @@ nonisolated struct AttributedStringBuilder: AttributedStringBuilderProtocol {
                 content = attributedString(element: childElement, documentBody: documentBody, preserveFormatting: preserveFormatting, listTag: listTag, listIndex: &childIndex, indentLevel: indentLevel)
                 content.addAttribute(.underlineStyle, value: NSUnderlineStyle.single.rawValue, range: NSRange(location: 0, length: content.length))
                 
-            case "s", "del":
+            case "s", "del", "strike":
                 content = attributedString(element: childElement, documentBody: documentBody, preserveFormatting: preserveFormatting, listTag: listTag, listIndex: &childIndex, indentLevel: indentLevel)
                 content.addAttribute(.strikethroughStyle, value: NSUnderlineStyle.single.rawValue, range: NSRange(location: 0, length: content.length))
                 

UnitTests/Sources/AttributedStringBuilderTests.swift

@@ -673,6 +673,17 @@ struct AttributedStringBuilderTests {
         #expect(String(attributedString.characters) == "one two")
     }
     
+    @Test
+    func strikethroughTags() throws {
+        var strikethrough = AttributedString("one")
+        strikethrough[AttributeScopes.UIKitAttributes.StrikethroughStyleAttribute.self] = .single
+        
+        for tag in ["s", "del", "strike"] {
+            let attributedString = try #require(attributedStringBuilder.fromHTML("<\(tag)>one</\(tag)>"), "Could not build the attributed string")
+            #expect(attributedString == strikethrough, "<\(tag)> should render as a strikethrough")
+        }
+    }
+    
     @Test
     func unorderedList() throws {
         let htmlString = "<ul><li>1</li><li>2</li><li>3</li></ul>"