chore: restructure llm plugin to be more coherent & fix various bugs in llm ui

Plugins/ZShell/Llm/markdownparser.hpp

@@ -1,13 +1,24 @@
 #pragma once
 
+#include "markdownblock.hpp"
+
 #include <QString>
-#include <QVariantList>
+#include <QVector>
 
 namespace ZShell::llm {
 
+struct MarkdownBlockData {
+	MarkdownBlock::Type type = MarkdownBlock::Type::Text;
+	QString text;
+	QString latex;
+	QString code;
+	QString language;
+	int level = 0;
+};
+
 class MarkdownParser {
 	public:
-	[[nodiscard]] static QVariantList parse(const QString& source);
+	[[nodiscard]] static QVector<MarkdownBlockData> parse(const QString& source);
 };
 
 } // namespace ZShell::llm