feat(i18n): complete migration — items, entities, AI goals, GUI screens

119 new translation keys across 3 domains:
- Items/Blocks/Misc (46 keys): tooltips, action messages, trap states
- Entities/AI Goals (55 keys): NPC speech, maid/master/guard messages
- Client GUI (18 keys): widget labels, screen buttons, merchant display

Remaining 119 Component.literal() are all intentional:
- Debug/Admin/Command wands (47) — dev tools, not player-facing
- Entity display names (~25) — dynamic getNpcName() calls
- Empty string roots (~15) — .append() chain bases
- User-typed text (~10) — /me, /pm, /norp chat content
- Runtime data (~12) — StringBuilder, gag muffling, MCA compat

src/main/java/com/tiedup/remake/prison/service/PrisonerService.java

@@ -893,8 +893,8 @@ public class PrisonerService {
                                     ) guardEntity.discard();
                                 }
                                 player.sendSystemMessage(
-                                    Component.literal(
-                                        "You have been returned to your cell."
+                                    Component.translatable(
+                                        "msg.tiedup.prison.returned_to_cell"
                                     ).withStyle(ChatFormatting.GRAY)
                                 );
                                 TiedUpMod.LOGGER.info(