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/CommandHandler.ts

@@ -2,6 +2,7 @@ import { ChatInputCommandInteraction, MessageFlags } from "discord.js";
 import { AuroraClient } from "@/lib/BotClient";
 import { userService } from "@/modules/user/user.service";
 import { createErrorEmbed } from "@lib/embeds";
+import { logger } from "@lib/logger";
 
 /**
  * Handles slash command execution
@@ -12,7 +13,7 @@ export class CommandHandler {
         const command = AuroraClient.commands.get(interaction.commandName);
 
         if (!command) {
-            console.error(`No command matching ${interaction.commandName} was found.`);
+            logger.error(`No command matching ${interaction.commandName} was found.`);
             return;
         }
 
@@ -20,13 +21,13 @@ export class CommandHandler {
         try {
             await userService.getOrCreateUser(interaction.user.id, interaction.user.username);
         } catch (error) {
-            console.error("Failed to ensure user exists:", error);
+            logger.error("Failed to ensure user exists:", error);
         }
 
         try {
             await command.execute(interaction);
         } catch (error) {
-            console.error(error);
+            logger.error(String(error));
             const errorEmbed = createErrorEmbed('There was an error while executing this command!');
 
             if (interaction.replied || interaction.deferred) {