feat: include resize edge with will-resize event (#29199)

* feat: emit resize edge with will-resize event

fix: wparam type

fix: private member usage on mac

docs: will-resize event edge option

refactor: 'info' -> 'details' for better type gen

* Update docs/api/browser-window.md

Co-authored-by: Samuel Attard <samuel.r.attard@gmail.com>

* Update docs/api/browser-window.md

Co-authored-by: Samuel Attard <samuel.r.attard@gmail.com>

shell/browser/ui/cocoa/electron_ns_window_delegate.h

@@ -8,6 +8,7 @@
 #include <Quartz/Quartz.h>
 
 #include "components/remote_cocoa/app_shim/views_nswindow_delegate.h"
+#include "third_party/abseil-cpp/absl/types/optional.h"
 
 namespace electron {
 class NativeWindowMac;
@@ -20,6 +21,11 @@ class NativeWindowMac;
   bool is_zooming_;
   int level_;
   bool is_resizable_;
+
+  // Only valid during a live resize.
+  // Used to keep track of whether a resize is happening horizontally or
+  // vertically, even if physically the user is resizing in both directions.
+  absl::optional<bool> resizingHorizontally_;
 }
 - (id)initWithShell:(electron::NativeWindowMac*)shell;
 @end