Allow given picture classes/paths to core_pushNotification

[Adanteh]

Being able to use extra pictures would be nice, allow some config class for Notifications to have extra paths (Because you like configs), or by given a path to a picture directly.

Something like this would work

		private _imageSlug =  (_data select 0);
		
		private _image = _imageSlug call {
			private _notifcationCfg = configFile >> "CfgSurfacePainter" >> "Notifications" >> _this;
			if (isText (_notifcationCfg >> "path")) exitWith { getText (_notifcationCfg >> "path"); };

			if ((_this select [count _this - 4, 4]) == ".paa") exitWith { _this };

			switch (toUpper _this) do {
				case ("WARNING"): {"x\surface_painter\addons\sp_core\data\notification_yellow_co.paa"};
				case ("NOK"): {"x\surface_painter\addons\sp_core\data\notification_red_co.paa"};
				default {"x\surface_painter\addons\sp_core\data\notification_green_co.paa"};
			};
		};