Partial atmos refactor (#22521)

* Reduce atmos component queries

* Remove method events

* Cache airtight data

* Make MolesArchived nullable

* Fix airtight cache

* only get tile def once

* Immutable mixtures

* firelock queries

* misc

* misc cleanup

* Trim disconnected tiles

* Fix merge issues and bugs

* Why does the PR keep increasing in scope

* debug overlay

* Fix bugs

* Fix test, remove unused events

* Add setmapatmos command

* Fix overlays

* Add map check

* A

* Resolve conflicts with #26102

* Remove some obsolete methods

Content.Server/Body/Systems/LungSystem.cs

@@ -77,7 +77,7 @@ public sealed class LungSystem : EntitySystem
         foreach (var gas in Enum.GetValues<Gas>())
         {
             var i = (int) gas;
-            var moles = lung.Air.Moles[i];
+            var moles = lung.Air[i];
             if (moles <= 0)
                 continue;
             var reagent = _atmosphereSystem.GasReagents[i];