layout: rethonk layouts from the ground up (#12890)

Rewrites layouts to be much smaller, and deal with much less annoying
BS. Improves the overall architecture, unifies handling of pseudotiling,
and various other improvements.

src/protocols/ForeignToplevelWlr.cpp

@@ -377,7 +377,7 @@ CForeignToplevelWlrProtocol::CForeignToplevelWlrProtocol(const wl_interface* ifa
     });
 
     static auto P3 = g_pHookSystem->hookDynamic("activeWindow", [this](void* self, SCallbackInfo& info, std::any data) {
-        const auto PWINDOW = std::any_cast<PHLWINDOW>(data);
+        const auto PWINDOW = std::any_cast<Desktop::View::SWindowActiveEvent>(data).window;
 
         if (PWINDOW && !windowValidForForeign(PWINDOW))
             return;