Makes Airtight ECS. (#4351)

* Makes Airtight ECS.

* Remove atmos holdovers while at it!

Content.Server/Atmos/Commands/SetAtmosTemperatureCommand.cs

@@ -0,0 +1,53 @@
+using Content.Server.Administration;
+using Content.Server.Atmos.EntitySystems;
+using Content.Shared.Administration;
+using Content.Shared.Atmos;
+using Robust.Shared.Console;
+using Robust.Shared.GameObjects;
+using Robust.Shared.IoC;
+using Robust.Shared.Map;
+
+namespace Content.Server.Atmos.Commands
+{
+    [AdminCommand(AdminFlags.Debug)]
+    public class SetAtmosTemperatureCommand : IConsoleCommand
+    {
+        public string Command => "setatmostemp";
+        public string Description => "Sets a grid's temperature (in kelvin).";
+        public string Help => "Usage: setatmostemp <GridId> <Temperature>";
+
+        public void Execute(IConsoleShell shell, string argStr, string[] args)
+        {
+            if (args.Length < 2) return;
+            if(!int.TryParse(args[0], out var id)
+               || !float.TryParse(args[1], out var temperature)) return;
+
+            var gridId = new GridId(id);
+
+            var mapMan = IoCManager.Resolve<IMapManager>();
+
+            if (temperature < Atmospherics.TCMB)
+            {
+                shell.WriteLine("Invalid temperature.");
+                return;
+            }
+
+            if (!gridId.IsValid() || !mapMan.TryGetGrid(gridId, out var gridComp))
+            {
+                shell.WriteLine("Invalid grid ID.");
+                return;
+            }
+
+            var atmosphereSystem = EntitySystem.Get<AtmosphereSystem>();
+
+            var tiles = 0;
+            foreach (var tile in atmosphereSystem.GetAllTileMixtures(gridId, true))
+            {
+                tiles++;
+                tile.Temperature = temperature;
+            }
+
+            shell.WriteLine($"Changed the temperature of {tiles} tiles.");
+        }
+    }
+}