fix: Unify superpickaxe behavior (#1553)

Fixes https://github.com/IntellectualSites/FastAsyncWorldEdit/issues/1547

worldedit-core/src/main/java/com/sk89q/worldedit/command/ToolUtilCommands.java

@@ -180,8 +180,8 @@ public class ToolUtilCommands {
     }
 
     @Command(
-            name = "/superpickaxe",
-            aliases = {",", "/sp", "/pickaxe", "/"},
+            name = "/",
+            aliases = {","},
             desc = "Toggle the super pickaxe function"
     )
     @CommandPermissions("worldedit.superpickaxe")

worldedit-core/src/main/java/com/sk89q/worldedit/extension/platform/PlatformCommandManager.java

@@ -474,7 +474,9 @@ public final class PlatformCommandManager {
             );
             registerSubCommands(
                     "superpickaxe",
-                    ImmutableList.of("pickaxe", "sp"),
+                    //FAWE start - register /<command> commands
+                    ImmutableList.of("pickaxe", "/pickaxe", "sp", "/sp"),
+                    //FAWE end
                     "Super-pickaxe commands",
                     SuperPickaxeCommandsRegistration.builder(),
                     new SuperPickaxeCommands(worldEdit)