Solution Entities (#21916)

* Creates Content.Shared.Chemistry.Solutions
Copies Solution class to new namespace
Obsoletes old Solution class

* Switches over to the Solutions.Solution Solution

* Creates Content.Shared.Chemistry.Containers
Copies relevant components/systems to the new namespace
Obsoletes old versions

* Switches over to the Containers.XYZ namespace

* Creates SolutionSystem and obsoletes old SolutionContainerSystem methods

* Start using SolutionSystem for Solution manipulation

* EnumerateSolutions

* Move TryGetMixableSolution

* Move EnsureSolution to Server

* Create Solution Entities

* Stop using obsolete solution system methods

* Fix prototype component tests

* Add using ..Audio.Systems; back

* Wrap solution container slots in ContainerSlots

* Actually add the slot to the solution container map

* Dirty SolutionContainerComponent when ensuring solutions

* Revert namespace changes

* Remerge SolutionSystem and SolutionContainerSystem

* SolutionContainerManagerComponent refactor

* Avoid wrapping necessary code in DebugTools.Assert as it is removed when compiling for release

* Readd examine reagent sorting

* Fix errors

* Poke tests

* Fix solution names not being applied

* Fix WoolyComponent including statement

* Fix merge skew

* Fix compile errors

* Make reactions use solntities

* Reindent solution class namespace

* Field attribute changes

* AutoGenerateComponentState for SolutionContainerComponent

* SolutionContainerComponent -> ContainedSolutionComponent

* ref ReactionAttemptEvent

* Denetwork preinit solutions

* Misc 1

* Nullable TryGetSolution out vars

* Cache associated solutions

* Fix merge skew

* Use explicit regions in SharedSolutionContainerSystem.Capabilities

* Add debug assert

* Use explicit regions in SharedSolutionContainerSystem.Relay + ref SolutionContainerChangedEvent

* ContainedSolutionComponent.Name -> ContainedSolutionComponent.ContainerName

* SolutionComponent doc comments

* Implicit DataField names and property purge

* ReagentEffect DataField names

* Local variables for readability

* Sort using statements + Entity<T> event handlers

* Fix compile erros

* Fix compile errors

---------

Co-authored-by: ElectroJr <leonsfriedrich@gmail.com>

Content.Server/Body/Systems/LungSystem.cs

@@ -1,8 +1,8 @@
 using Content.Server.Atmos.Components;
 using Content.Server.Atmos.EntitySystems;
 using Content.Server.Body.Components;
+using Content.Server.Chemistry.Containers.EntitySystems;
 using Content.Shared.Atmos;
-using Content.Shared.Chemistry.EntitySystems;
 using Content.Shared.Clothing;
 using Content.Shared.Inventory.Events;
 
@@ -44,11 +44,11 @@ public sealed class LungSystem : EntitySystem
         }
     }
 
-    private void OnComponentInit(EntityUid uid, LungComponent component, ComponentInit args)
+    private void OnComponentInit(Entity<LungComponent> entity, ref ComponentInit args)
     {
-        component.LungSolution = _solutionContainerSystem.EnsureSolution(uid, LungSolutionName);
-        component.LungSolution.MaxVolume = 100.0f;
-        component.LungSolution.CanReact = false; // No dexalin lungs
+        var solution = _solutionContainerSystem.EnsureSolution(entity.Owner, entity.Comp.SolutionName);
+        solution.MaxVolume = 100.0f;
+        solution.CanReact = false; // No dexalin lungs
     }
 
     private void OnMaskToggled(Entity<BreathToolComponent> ent, ref ItemMaskToggledEvent args)
@@ -71,6 +71,9 @@ public sealed class LungSystem : EntitySystem
 
     public void GasToReagent(EntityUid uid, LungComponent lung)
     {
+        if (!_solutionContainerSystem.ResolveSolution(uid, lung.SolutionName, ref lung.Solution, out var solution))
+            return;
+
         foreach (var gas in Enum.GetValues<Gas>())
         {
             var i = (int) gas;
@@ -81,11 +84,13 @@ public sealed class LungSystem : EntitySystem
             if (reagent == null) continue;
 
             var amount = moles * Atmospherics.BreathMolesToReagentMultiplier;
-            _solutionContainerSystem.TryAddReagent(uid, lung.LungSolution, reagent, amount, out _);
+            solution.AddReagent(reagent, amount);
 
             // We don't remove the gas from the lung mix,
             // that's the responsibility of whatever gas is being metabolized.
             // Most things will just want to exhale again.
         }
+
+        _solutionContainerSystem.UpdateChemicals(lung.Solution.Value);
     }
 }