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

Plugins/ZShell/Llm/filetool.hpp

@@ -8,16 +8,15 @@ class FileReadTool : public LlmTool {
 	Q_OBJECT
 
 	public:
-	explicit FileReadTool(QObject* parent = nullptr);
+	explicit FileReadTool(ToolRegistry* registry, QObject* parent = nullptr);
 
 	QString name() const override;
 	QString description() const override;
 	QJsonObject parameters() const override;
 	void execute(
-		const QString& toolCallId,
+		const ToolContext& context,
 		const QJsonObject& args,
-		int outputBudgetChars,
-		std::function<void(const QJsonObject& result)> done) override;
+		ToolDone done) override;
 };
 
 } // namespace ZShell::llm