feat: /제작대, /workbench 명령어 추가 - 제작대 블록 없이 제작대 GUI 열기

Essentials/src/main/kotlin/com/beemer/essentials/Essentials.kt

@@ -33,5 +33,6 @@ class Essentials(modEventBus: IEventBus) {
         NeoForge.EVENT_BUS.register(NicknameCommand)
         NeoForge.EVENT_BUS.register(HeadCommand)
         NeoForge.EVENT_BUS.register(HelpCommand)
+        NeoForge.EVENT_BUS.register(WorkbenchCommand)
     }
 }

Essentials/src/main/kotlin/com/beemer/essentials/command/HelpCommand.kt

@@ -70,6 +70,11 @@ object HelpCommand {
         sendCategory(player, "머리", ChatFormatting.GOLD)
         sendCommand(player, "/머리", "내 머리 아이템 받기")
         sendCommand(player, "/머리 <닉네임>", "해당 플레이어 머리 받기")
+        player.sendSystemMessage(Component.empty())
+
+        // 제작대
+        sendCategory(player, "제작대", ChatFormatting.WHITE)
+        sendCommand(player, "/제작대", "제작대 열기")
 
         val footer =
                 Component.literal("═══════════════════════════════").withStyle {

Essentials/src/main/kotlin/com/beemer/essentials/command/WorkbenchCommand.kt

@@ -0,0 +1,66 @@
+package com.beemer.essentials.command
+
+import java.util.Optional
+import java.util.function.BiFunction
+import net.minecraft.ChatFormatting
+import net.minecraft.commands.Commands
+import net.minecraft.core.BlockPos
+import net.minecraft.network.chat.Component
+import net.minecraft.server.level.ServerPlayer
+import net.minecraft.world.SimpleMenuProvider
+import net.minecraft.world.entity.player.Player
+import net.minecraft.world.inventory.ContainerLevelAccess
+import net.minecraft.world.inventory.CraftingMenu
+import net.minecraft.world.level.Level
+import net.neoforged.bus.api.SubscribeEvent
+import net.neoforged.neoforge.event.RegisterCommandsEvent
+
+object WorkbenchCommand {
+    @SubscribeEvent
+    fun onRegisterCommands(event: RegisterCommandsEvent) {
+        // /제작대, /workbench - 제작대 GUI 열기
+        listOf("제작대", "workbench").forEach { command ->
+            event.dispatcher.register(
+                    Commands.literal(command).executes { context ->
+                        val player = context.source.entity as? ServerPlayer
+                        if (player == null) {
+                            context.source.sendFailure(
+                                    Component.literal("플레이어만 사용할 수 있는 명령어입니다.")
+                                            .withStyle(ChatFormatting.RED)
+                            )
+                            return@executes 0
+                        }
+
+                        openWorkbench(player)
+                        1
+                    }
+            )
+        }
+    }
+
+    /** 항상 유효한 ContainerLevelAccess 생성 */
+    private fun createAlwaysValidAccess(level: Level, pos: BlockPos): ContainerLevelAccess {
+        return object : ContainerLevelAccess {
+            override fun <T : Any> evaluate(function: BiFunction<Level, BlockPos, T>): Optional<T> {
+                return Optional.ofNullable(function.apply(level, pos))
+            }
+        }
+    }
+
+    /** 플레이어에게 제작대 GUI 열기 */
+    private fun openWorkbench(player: ServerPlayer) {
+        val access = createAlwaysValidAccess(player.level(), player.blockPosition())
+
+        player.openMenu(
+                SimpleMenuProvider(
+                        { containerId, inventory, _ ->
+                            object : CraftingMenu(containerId, inventory, access) {
+                                // stillValid를 오버라이드하여 항상 true 반환 (거리 제한 없음)
+                                override fun stillValid(player: Player): Boolean = true
+                            }
+                        },
+                        Component.translatable("container.crafting")
+                )
+        )
+    }
+}