feat(conquistas): view any player's titles, /perfil card, wearable title tag

Extend the achievements module from self-only to a full RPG-status layer,
all still chat-only and derived from vanilla stats.

- /conquistas [jogador]: look up anyone's earned titles, offline included,
  computed from their stats on disk via the new OfflineStats.achievementStats
  (same keys the online snapshot uses, so identical Achievement conditions).
- /perfil [jogador]: a status card — headline stats, titles earned, worn title.
- /titulo [nome|limpar]: pick which earned title to wear; only earned ones are
  accepted and tab-completed. Stored per player in titulos.yml (Titles).
- TitleChatListener: an AsyncChat renderer that prefixes the chosen "[Título]"
  chip, for Java and Bedrock alike; gated on the conquistas module.

Tests: TitlesTest covers title selection and the offline stat-key contract.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/main/resources/plugin.yml

@@ -87,9 +87,17 @@ commands:
     usage: /mortes
     aliases: [minhasmortes]
   conquistas:
-    description: Lista as conquistas e marca as que você já desbloqueou.
-    usage: /conquistas
+    description: Lista as conquistas e marca as que você (ou outro jogador) já desbloqueou.
+    usage: /conquistas [jogador]
     aliases: [conquista]
+  perfil:
+    description: Mostra o perfil de um jogador — estatísticas, conquistas e título.
+    usage: /perfil [jogador]
+    aliases: [status]
+  titulo:
+    description: Escolhe qual conquista você exibe como título no chat.
+    usage: /titulo [nome|limpar]
+    aliases: [titulos, title]
 
 permissions:
   # Declared explicitly: an undeclared Bukkit permission falls back to op-only,