Implement slash command synchronization features in environment files and update command definitions to hybrid commands across various cogs. Enhance command registration for improved user experience and streamline command handling in the bot.

.env.docker.example

@@ -19,6 +19,11 @@ LAVALINK_PORT=13592
 EMOJI_SYNC=false
 JISHAKU_ENABLED=false
 
+# Slash (/) command sync — guild sync makes commands appear immediately
+SLASH_SYNC_GLOBAL=true
+SLASH_SYNC_ALL_GUILDS=true
+# SLASH_GUILD_IDS=
+
 # Traefik (optional override — default in compose: letsencrypt)
 # TRAEFIK_CERT_RESOLVER=letsencrypt