LibHTML: Add support for <font color>

This was pleasantly trivial to implement with the new support for
presentational hints. :^)

Libraries/LibHTML/DOM/HTMLFontElement.h

@@ -0,0 +1,11 @@
+#pragma once
+
+#include <LibHTML/DOM/HTMLElement.h>
+
+class HTMLFontElement : public HTMLElement {
+public:
+    HTMLFontElement(Document&, const String& tag_name);
+    virtual ~HTMLFontElement() override;
+
+    virtual void apply_presentational_hints(StyleProperties&) const override;
+};