refactor: replace console.* with logger in core lib files

Update loaders, handlers, and BotClient to use centralized logger:
- CommandLoader.ts and EventLoader.ts
- AutocompleteHandler.ts, CommandHandler.ts, ComponentInteractionHandler.ts
- BotClient.ts

Provides consistent formatting across all core library logging.

src/lib/handlers/AutocompleteHandler.ts

@@ -1,5 +1,6 @@
 import { AutocompleteInteraction } from "discord.js";
 import { AuroraClient } from "@/lib/BotClient";
+import { logger } from "@lib/logger";
 
 /**
  * Handles autocomplete interactions for slash commands
@@ -15,7 +16,7 @@ export class AutocompleteHandler {
         try {
             await command.autocomplete(interaction);
         } catch (error) {
-            console.error(`Error handling autocomplete for ${interaction.commandName}:`, error);
+            logger.error(`Error handling autocomplete for ${interaction.commandName}:`, error);
         }
     }
 }