service/pipewire: add pipewire module

src/services/pipewire/connection.cpp

@@ -0,0 +1,23 @@
+#include "connection.hpp"
+
+#include <qobject.h>
+
+namespace qs::service::pipewire {
+
+PwConnection::PwConnection(QObject* parent): QObject(parent) {
+	if (this->core.isValid()) {
+		this->registry.init(this->core);
+	}
+}
+
+PwConnection* PwConnection::instance() {
+	static PwConnection* instance = nullptr; // NOLINT
+
+	if (instance == nullptr) {
+		instance = new PwConnection();
+	}
+
+	return instance;
+}
+
+} // namespace qs::service::pipewire