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.Shared/Chemistry/Components/SolutionComponent.cs

@@ -0,0 +1,22 @@
+using Content.Shared.Chemistry.Components.SolutionManager;
+using Content.Shared.Materials;
+using Robust.Shared.GameStates;
+
+namespace Content.Shared.Chemistry.Components;
+
+/// <summary>
+/// <para>Holds the composition of an entity made from reagents and its reagent temperature.</para>
+/// <para>If the entity is used to represent a collection of reagents inside of a container such as a beaker, syringe, bloodstream, food, or similar the entity is tracked by a <see cref="SolutionContainerManagerComponent"/> on the container and has a <see cref="ContainedSolutionComponent"/> tracking which container it's in.</para>
+/// </summary>
+/// <remarks>
+/// <para>Once reagents and materials have been merged this component should be depricated in favor of using a combination of <see cref="PhysicalCompositionComponent"/> and <see cref="Content.Server.Temperature.Components.TemperatureComponent"/>. May require minor reworks to both.</para>
+/// </remarks>
+[RegisterComponent, NetworkedComponent, AutoGenerateComponentState]
+public sealed partial class SolutionComponent : Component
+{
+    /// <summary>
+    /// <para>The reagents the entity is composed of and their temperature.</para>
+    /// </summary>
+    [DataField, AutoNetworkedField]
+    public Solution Solution = new();
+}