Refactor Native Messages (#4738)

* refactor: move ipc queue into its own class

* refactor: move windows.h related functions to AW

* refactor: make NM-Client methods static

* refactor: json access

* refactor: use struct initializer

* refactor: move `handleMessage` to anon-namespace

* refactor: clean-up includes

* refactor: move action handler to functions

* refactor: cleanup `handleSelect`

* fix: cleanup clang-tidy warnings

* chore: simplify json

* revert: keep handlers as methods

This is more readable and extensible.

* fix: typo

* fix: namespace

* fix: rename define

* refactor: `IpcQueue` to be simpler

* fix: rename cmake option

* fix: use variant when constructing

* fix: make it a ref

* fix: its a pair now

src/widgets/AttachedWindow.cpp

@@ -136,6 +136,13 @@ AttachedWindow *AttachedWindow::get(void *target, const GetArgs &args)
     return window;
 }
 
+#ifdef USEWINSDK
+AttachedWindow *AttachedWindow::getForeground(const GetArgs &args)
+{
+    return AttachedWindow::get(::GetForegroundWindow(), args);
+}
+#endif
+
 void AttachedWindow::detach(const QString &winId)
 {
     for (Item &item : items)