ChanViewer: Start working on a simple read-only 4Chan viewer

Since they are nice enough to provide a JSON API over HTTP, this makes
for a perfect way to exercise our networking code a bit. :^)

Applications/ChanViewer/main.cpp

@@ -0,0 +1,25 @@
+#include "ThreadCatalogModel.h"
+#include <LibGUI/GApplication.h>
+#include <LibGUI/GBoxLayout.h>
+#include <LibGUI/GTableView.h>
+#include <LibGUI/GWindow.h>
+
+int main(int argc, char** argv)
+{
+    GApplication app(argc, argv);
+
+    auto* window = new GWindow;
+    window->set_title("ChanViewer");
+    window->set_rect(100, 100, 640, 480);
+
+    auto* widget = new GWidget;
+    window->set_main_widget(widget);
+    widget->set_layout(make<GBoxLayout>(Orientation::Vertical));
+
+    auto* catalog_view = new GTableView(widget);
+    catalog_view->set_model(ThreadCatalogModel::create());
+
+    window->show();
+
+    return app.exec();
+}