[PowerRename] Handle many items w/o crashing and OOM (#26761)

* [PowerRename] Disable AnimatedIcon (check mark) for CheckBox to prevent crashes
* [PowerRename] Implement lightweight ExplorerItemsSource/VM

src/modules/powerrename/PowerRenameUILib/ExplorerItemsSource.cpp

@@ -0,0 +1,12 @@
+#include "pch.h"
+#include "ExplorerItemsSource.h"
+#if __has_include("ExplorerItemsSource.g.cpp")
+#include "ExplorerItemsSource.g.cpp"
+#endif
+
+using namespace winrt;
+using namespace Windows::UI::Xaml;
+
+namespace winrt::PowerRenameUI::implementation
+{
+}