Console Unify API Changes (#3059)

* Remove unused IChatCommand.

* Lots of refactoring into a shared context.

* Removed ICommonSession from server concmd Execute.

* Added argStr parameter to concmd execute.

* The execute function of client concmds now returns void, use the new shell.RemoteExecuteCommand function to forward commands.

* Finally move shells and commands into shared.

* Console commands can now be registered directly without a class in a shared context.

* Engine API Changes.

* Repair rebase damage.

* Update Submodule.

Content.Client/Commands/HideMechanismsCommand.cs

@@ -1,7 +1,7 @@
 using Content.Shared.GameObjects.Components.Body.Mechanism;
 using Robust.Client.Console;
 using Robust.Client.GameObjects;
-using Robust.Client.Interfaces.Console;
+using Robust.Shared.Console;
 using Robust.Shared.Containers;
 using Robust.Shared.Interfaces.GameObjects;
 using Robust.Shared.IoC;
@@ -14,7 +14,7 @@ namespace Content.Client.Commands
         public string Description => $"Reverts the effects of {ShowMechanismsCommand.CommandName}";
         public string Help => $"{Command}";
 
-        public bool Execute(IDebugConsole console, params string[] args)
+        public void Execute(IConsoleShell shell, string argStr, string[] args)
         {
             var componentManager = IoCManager.Resolve<IComponentManager>();
             var mechanisms = componentManager.EntityQuery<IMechanism>();
@@ -41,9 +41,7 @@ namespace Content.Client.Commands
                 }
             }
 
-            IoCManager.Resolve<IClientConsole>().ProcessCommand("hidecontainedcontext");
-
-            return false;
+            IoCManager.Resolve<IClientConsoleHost>().ExecuteCommand("hidecontainedcontext");
         }
     }
 }