💥 Add alias list to CommandProtocol

Sources/Commandant/Command.swift

@@ -20,6 +20,9 @@ public protocol CommandProtocol {
 	/// `help`).
 	var verb: String { get }
 
+	/// Optional list of additional verbs which can be used to invoke this command.
+	var aliases: [String] { get }
+
 	/// A human-readable, high-level description of what this command is used
 	/// for.
 	var function: String { get }
@@ -96,6 +99,10 @@ public final class CommandRegistry<ClientError: Error> {
 	{
 		for command in commands {
 			commandsByVerb[command.verb] = CommandWrapper(command)
+			// Register command for each additional alias
+			for alias in command.aliases {
+				commandsByVerb[alias] = CommandWrapper(command)
+			}
 		}
 		return self
 	}

Sources/Commandant/HelpCommand.swift

@@ -18,9 +18,11 @@ import Foundation
 /// 	let helpCommand = HelpCommand(registry: commands)
 /// 	commands.register(helpCommand)
 public struct HelpCommand<ClientError: Error>: CommandProtocol {
+
 	public typealias Options = HelpOptions<ClientError>
 
 	public let verb = "help"
+	public let aliases: [String] = []
 	public let function: String
 
 	private let registry: CommandRegistry<ClientError>