Body code cleanup (#24946)

* Fix test

* Kill float accumulators

* Use entity proxy methods

* DataField auto name generation where possible

* Kill comp properties

* Clean up server comps

* Make events record structs

* Clean up shared body code

* Clean up server body code

* Rename organ events to be same names as in med refactor

Content.Server/Body/Components/LungComponent.cs

@@ -1,4 +1,4 @@
-using Content.Server.Atmos;
+using Content.Server.Atmos;
 using Content.Server.Body.Systems;
 using Content.Shared.Alert;
 using Content.Shared.Atmos;
@@ -11,7 +11,7 @@ public sealed partial class LungComponent : Component
 {
     [DataField]
     [Access(typeof(LungSystem), Other = AccessPermissions.ReadExecute)] // FIXME Friends
-    public GasMixture Air { get; set; } = new()
+    public GasMixture Air = new()
     {
         Volume = 6,
         Temperature = Atmospherics.NormalBodyTemperature