Added basic help and quit functions to tools.

src/SlatedGameToolkit.Tools/System/IInvocable.cs

@@ -1,3 +1,5 @@
+using SlatedGameToolkit.Tools.System.Interaction;
+
 namespace SlatedGameToolkit.Tools.System
 {
     public interface IInvocable
@@ -12,16 +14,24 @@ namespace SlatedGameToolkit.Tools.System
         /// <summary>
         /// The help should be a description of how to properly use this invokable.
         /// If an argument is specified, the help should cater to that specific argument.
+        /// Information in the description does not need to be repeated.
         /// </summary>
         /// <param name="arg">An argument this invokable should describe. May be null, to which should return a string that describes this invokable in general.</param>
         /// <returns></returns>
-        string getHelp(string arg);
+        string getUsage(string arg);
         
         /// <summary>
         /// Executes this invokable.
         /// </summary>
+        /// <param name="interactable">The interactable object.</param>
         /// <param name="args">The arguments that followed the invokable.</param>
         /// <returns>True if the invokable was successful, false otherwise to display a generic help message.</returns>
-        bool Execute(string[] args);
+        bool Execute(IInteractable interactable, string[] args);
+
+        /// <summary>
+        /// Gets a simple description of the command.
+        /// </summary>
+        /// <returns>Return a string with a short description of the command.</returns>
+        string getDescription();
     }
 }