Switch from Qt6 to Slint

lib/mirai-core/EventEmitter.h

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+/*
+ * Mirai. Copyright (C) 2024 Vyn
+ * This file is licensed under version 3 of the GNU General Public License (GPL-3.0-only)
+ * The license can be found in the LICENSE file or at https://www.gnu.org/licenses/gpl-3.0.txt
+ */
+
+#include <functional>
+#include <vector>
+
+template <typename T> class EventEmitter
+{
+
+  public:
+	void registerCallback(std::function<T> func)
+	{
+		callbacks.push_back(func);
+	}
+
+	void emit(T data)
+	{
+		for (auto &callback : callbacks) {
+			callback(data);
+		}
+	}
+
+  private:
+	std::vector<std::function<T>> callbacks;
+};