ECS Atmos Part 4: Moves all atmos logic from TileAtmosphere to AtmosphereSystem. (#4295)

* Moves all atmos logic from TileAtmosphere to AtmosphereSystem.

* Atmos uses grid anchoring to check for firelocks instead of grid tile lookups.

* CVar for space wind sound

* CVar for explosive depressurization

Content.Server/Atmos/MonstermosInfo.cs

@@ -0,0 +1,82 @@
+using System;
+using Content.Shared.Atmos;
+using Robust.Shared.ViewVariables;
+
+namespace Content.Server.Atmos
+{
+    public struct MonstermosInfo
+    {
+        [ViewVariables]
+        public int LastCycle;
+
+        [ViewVariables]
+        public long LastQueueCycle;
+
+        [ViewVariables]
+        public long LastSlowQueueCycle;
+
+        [ViewVariables]
+        public float MoleDelta;
+
+        [ViewVariables]
+        public float TransferDirectionEast;
+
+        [ViewVariables]
+        public float TransferDirectionWest;
+
+        [ViewVariables]
+        public float TransferDirectionNorth;
+
+        [ViewVariables]
+        public float TransferDirectionSouth;
+
+        [ViewVariables]
+        public float CurrentTransferAmount;
+
+        [ViewVariables]
+        public AtmosDirection CurrentTransferDirection;
+
+        [ViewVariables]
+        public bool FastDone;
+
+        public float this[AtmosDirection direction]
+        {
+            get =>
+                direction switch
+                {
+                    AtmosDirection.East => TransferDirectionEast,
+                    AtmosDirection.West => TransferDirectionWest,
+                    AtmosDirection.North => TransferDirectionNorth,
+                    AtmosDirection.South => TransferDirectionSouth,
+                    _ => throw new ArgumentOutOfRangeException(nameof(direction))
+                };
+
+            set
+            {
+                switch (direction)
+                {
+                    case AtmosDirection.East:
+                         TransferDirectionEast = value;
+                         break;
+                    case AtmosDirection.West:
+                        TransferDirectionWest = value;
+                        break;
+                    case AtmosDirection.North:
+                        TransferDirectionNorth = value;
+                        break;
+                    case AtmosDirection.South:
+                        TransferDirectionSouth = value;
+                        break;
+                    default:
+                        throw new ArgumentOutOfRangeException(nameof(direction));
+                }
+            }
+        }
+
+        public float this[int index]
+        {
+            get => this[(AtmosDirection) (1 << index)];
+            set => this[(AtmosDirection) (1 << index)] = value;
+        }
+    }
+}