Gas tanks and masks (#2409)

Co-authored-by: a.rudenko <creadth@gmail.com>
Co-authored-by: creadth <creadth@users.noreply.github.com>
Co-authored-by: DrSmugleaf <DrSmugleaf@users.noreply.github.com>

Content.Shared/GameObjects/ContentNetIDs.cs

@@ -82,6 +82,8 @@
         public const uint PLACEABLE_SURFACE = 1076;
         public const uint STORABLE = 1077;
         public const uint PULLABLE = 1078;
+        public const uint GAS_TANK = 1079;
+
 
         // Net IDs for integration tests.
         public const uint PREDICTION_TEST = 10001;