initial commit, command hooks, messenger and test command

src/main/java/carpet/mixins/CommandManagerMixin.java

@@ -0,0 +1,27 @@
+package carpet.mixins;
+
+import carpet.CarpetServer;
+import com.mojang.brigadier.CommandDispatcher;
+import net.minecraft.server.command.CommandManager;
+import net.minecraft.server.command.ServerCommandSource;
+import org.spongepowered.asm.mixin.Final;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+
+@Mixin(CommandManager.class)
+public abstract class CommandManagerMixin
+{
+
+    @Shadow
+    @Final
+    private CommandDispatcher<ServerCommandSource> dispatcher;
+
+    @Inject(method = "<init>", at = @At("RETURN"))
+    private void onRegister(boolean boolean_1, CallbackInfo ci) {
+        CarpetServer.registerCarpetCommands(this.dispatcher);
+    }
+}