[FancyZones] Implement File Watcher (#8603)

* Implement File Watcher in FancyZones

* Simplify code, address PR comments

* Add check to result of CreateEventW

* Rebase fix

Removed unneeded newline. If we keep it now, VS will just remove it some other time.

src/modules/fancyzones/lib/FancyZonesData.h

@@ -59,6 +59,11 @@ public:
         return appZoneHistoryMap;
     }
 
+    inline const std::wstring& GetZonesSettingsFileName() const 
+    {
+        return zonesSettingsFileName;
+    }
+
     bool AddDevice(const std::wstring& deviceId);
     void CloneDeviceInfo(const std::wstring& source, const std::wstring& destination);
     void UpdatePrimaryDesktopData(const std::wstring& desktopId);