feat: basic plugin system

The wayland plugin now uses it.

src/wayland/CMakeLists.txt

@@ -5,6 +5,11 @@ qt_add_library(quickshell-wayland STATIC
 	waylandlayershell.cpp
 )
 
+# required to make sure the constructor is linked
+add_library(quickshell-wayland-init OBJECT init.cpp)
+
+target_link_libraries(quickshell PRIVATE ${QT_DEPS} quickshell-waylandplugin quickshell-wayland-init)
+
 qt_add_qml_module(quickshell-wayland URI QuickShell.Wayland)
 
 find_package(PkgConfig REQUIRED)
@@ -13,6 +18,7 @@ pkg_check_modules(wayland REQUIRED IMPORTED_TARGET wayland-client wayland-protoc
 find_package(Qt6 REQUIRED COMPONENTS WaylandClient)
 
 target_link_libraries(quickshell-wayland PRIVATE ${QT_DEPS} wayland-client)
+target_link_libraries(quickshell-wayland-init PRIVATE ${QT_DEPS} wayland-client)
 
 # wayland protocols
 

src/wayland/init.cpp

@@ -0,0 +1,19 @@
+#include <qguiapplication.h>
+#include <qqml.h>
+
+#include "../core/plugin.hpp"
+#include "waylandlayershell.hpp"
+
+namespace {
+
+class WaylandPlugin: public QuickshellPlugin {
+	bool applies() override { return QGuiApplication::platformName() == "wayland"; }
+
+	void registerTypes() override {
+		qmlRegisterType<WaylandPanelInterface>("QuickShell", 1, 0, "PanelWindow");
+	}
+};
+
+QS_REGISTER_PLUGIN(WaylandPlugin);
+
+} // namespace

src/wayland/waylandlayershell.hpp

@@ -87,7 +87,6 @@ private:
 
 class WaylandPanelInterface: public PanelWindowInterface {
 	Q_OBJECT;
-	QML_NAMED_ELEMENT(PanelWindow); // temp
 
 public:
 	explicit WaylandPanelInterface(QObject* parent = nullptr);