crash: run platform compat hooks in crash reporter init

For some reason, QtWayland crashes we work around trigger in this
path. This was previously masked when the crash reporter didn't unmask
signals, as long as the original process crashed with SIGSEGV.

src/core/plugin.cpp

@@ -9,6 +9,18 @@ static QVector<QsEnginePlugin*> plugins; // NOLINT
 
 void QsEnginePlugin::registerPlugin(QsEnginePlugin& plugin) { plugins.push_back(&plugin); }
 
+void QsEnginePlugin::preinitPluginsOnly() {
+	plugins.removeIf([](QsEnginePlugin* plugin) { return !plugin->applies(); });
+
+	std::ranges::sort(plugins, [](QsEnginePlugin* a, QsEnginePlugin* b) {
+		return b->dependencies().contains(a->name());
+	});
+
+	for (QsEnginePlugin* plugin: plugins) {
+		plugin->preinit();
+	}
+}
+
 void QsEnginePlugin::initPlugins() {
 	plugins.removeIf([](QsEnginePlugin* plugin) { return !plugin->applies(); });
 
@@ -16,6 +28,10 @@ void QsEnginePlugin::initPlugins() {
 		return b->dependencies().contains(a->name());
 	});
 
+	for (QsEnginePlugin* plugin: plugins) {
+		plugin->preinit();
+	}
+
 	for (QsEnginePlugin* plugin: plugins) {
 		plugin->init();
 	}

src/core/plugin.hpp

@@ -18,12 +18,14 @@ public:
 	virtual QString name() { return QString(); }
 	virtual QList<QString> dependencies() { return {}; }
 	virtual bool applies() { return true; }
+	virtual void preinit() {}
 	virtual void init() {}
 	virtual void registerTypes() {}
 	virtual void constructGeneration(EngineGeneration& /*unused*/) {} // NOLINT
 	virtual void onReload() {}
 
 	static void registerPlugin(QsEnginePlugin& plugin);
+	static void preinitPluginsOnly();
 	static void initPlugins();
 	static void runConstructGeneration(EngineGeneration& generation);
 	static void runOnReload();

src/crash/main.cpp

@@ -25,6 +25,7 @@
 #include "../core/logging.hpp"
 #include "../core/logging_p.hpp"
 #include "../core/paths.hpp"
+#include "../core/plugin.hpp"
 #include "../core/ringbuf.hpp"
 #include "interface.hpp"
 
@@ -238,6 +239,9 @@ void qsCheckCrash(int argc, char** argv) {
 
 	qCInfo(logCrashReporter) << "Starting crash reporter...";
 
+	// Required platform compatibility hooks
+	QsEnginePlugin::preinitPluginsOnly();
+
 	recordCrashInfo(crashDir, info.instance);
 
 	auto gui = CrashReporterGui(crashDir.path(), crashProc);

src/wayland/init.cpp

@@ -33,8 +33,9 @@ class WaylandPlugin: public QsEnginePlugin {
 		return isWayland;
 	}
 
+	void preinit() override { installWlProxySafeDeref(); }
+
 	void init() override {
-		installWlProxySafeDeref();
 		installPlatformMenuHook();
 		installPopupPositioner();
 	}