Libraries: Add LibMarkdown

Libraries/LibMarkdown/MDList.h

@@ -0,0 +1,19 @@
+#pragma once
+
+#include <AK/Vector.h>
+#include <LibMarkdown/MDBlock.h>
+#include <LibMarkdown/MDText.h>
+
+class MDList final : public MDBlock {
+public:
+    virtual ~MDList() override {}
+
+    virtual String render_to_html() const override;
+    virtual String render_for_terminal() const override;
+    virtual bool parse(Vector<StringView>::ConstIterator& lines) override;
+
+private:
+    // TODO: List items should be considered blocks of their own kind.
+    Vector<MDText> m_items;
+    bool m_is_ordered { false };
+};