all: refactor windows code out of core

There are still some links from core to window but its now separate
enough to fix PanelWindow in qml tooling.

src/window/floatingwindow.cpp

@@ -0,0 +1,69 @@
+#include "floatingwindow.hpp"
+
+#include <qobject.h>
+#include <qqmlengine.h>
+#include <qqmllist.h>
+#include <qquickitem.h>
+#include <qtypes.h>
+
+#include "proxywindow.hpp"
+#include "windowinterface.hpp"
+
+void ProxyFloatingWindow::setWidth(qint32 width) {
+	if (this->window == nullptr || !this->window->isVisible()) {
+		this->ProxyWindowBase::setWidth(width);
+	}
+}
+
+void ProxyFloatingWindow::setHeight(qint32 height) {
+	if (this->window == nullptr || !this->window->isVisible()) {
+		this->ProxyWindowBase::setHeight(height);
+	}
+}
+
+// FloatingWindowInterface
+
+FloatingWindowInterface::FloatingWindowInterface(QObject* parent)
+    : WindowInterface(parent)
+    , window(new ProxyFloatingWindow(this)) {
+	// clang-format off
+	QObject::connect(this->window, &ProxyWindowBase::windowConnected, this, &FloatingWindowInterface::windowConnected);
+	QObject::connect(this->window, &ProxyWindowBase::visibleChanged, this, &FloatingWindowInterface::visibleChanged);
+	QObject::connect(this->window, &ProxyWindowBase::backerVisibilityChanged, this, &FloatingWindowInterface::backingWindowVisibleChanged);
+	QObject::connect(this->window, &ProxyWindowBase::heightChanged, this, &FloatingWindowInterface::heightChanged);
+	QObject::connect(this->window, &ProxyWindowBase::widthChanged, this, &FloatingWindowInterface::widthChanged);
+	QObject::connect(this->window, &ProxyWindowBase::screenChanged, this, &FloatingWindowInterface::screenChanged);
+	QObject::connect(this->window, &ProxyWindowBase::windowTransformChanged, this, &FloatingWindowInterface::windowTransformChanged);
+	QObject::connect(this->window, &ProxyWindowBase::colorChanged, this, &FloatingWindowInterface::colorChanged);
+	QObject::connect(this->window, &ProxyWindowBase::maskChanged, this, &FloatingWindowInterface::maskChanged);
+	// clang-format on
+}
+
+void FloatingWindowInterface::onReload(QObject* oldInstance) {
+	QQmlEngine::setContextForObject(this->window, QQmlEngine::contextForObject(this));
+
+	auto* old = qobject_cast<FloatingWindowInterface*>(oldInstance);
+	this->window->reload(old != nullptr ? old->window : nullptr);
+}
+
+QQmlListProperty<QObject> FloatingWindowInterface::data() { return this->window->data(); }
+ProxyWindowBase* FloatingWindowInterface::proxyWindow() const { return this->window; }
+QQuickItem* FloatingWindowInterface::contentItem() const { return this->window->contentItem(); }
+bool FloatingWindowInterface::isBackingWindowVisible() const {
+	return this->window->isVisibleDirect();
+}
+
+// NOLINTBEGIN
+#define proxyPair(type, get, set)                                                                  \
+	type FloatingWindowInterface::get() const { return this->window->get(); }                        \
+	void FloatingWindowInterface::set(type value) { this->window->set(value); }
+
+proxyPair(bool, isVisible, setVisible);
+proxyPair(qint32, width, setWidth);
+proxyPair(qint32, height, setHeight);
+proxyPair(QuickshellScreenInfo*, screen, setScreen);
+proxyPair(QColor, color, setColor);
+proxyPair(PendingRegion*, mask, setMask);
+
+#undef proxyPair
+// NOLINTEND