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/loaders/EventLoader.ts

@@ -3,6 +3,7 @@ import { join } from "node:path";
 import type { Event } from "@lib/types";
 import type { LoadResult } from "./types";
 import type { Client } from "../BotClient";
+import { logger } from "@lib/logger";
 
 /**
  * Handles loading events from the file system
@@ -43,7 +44,7 @@ export class EventLoader {
                 await this.loadEventFile(filePath, reload, result);
             }
         } catch (error) {
-            console.error(`Error reading directory ${dir}:`, error);
+            logger.error(`Error reading directory ${dir}:`, error);
             result.errors.push({ file: dir, error });
         }
     }
@@ -63,14 +64,14 @@ export class EventLoader {
                 } else {
                     this.client.on(event.name, (...args) => event.execute(...args));
                 }
-                console.log(`✅ Loaded event: ${event.name}`);
+                logger.success(`Loaded event: ${event.name}`);
                 result.loaded++;
             } else {
-                console.warn(`⚠️  Skipping invalid event in ${filePath}`);
+                logger.warn(`Skipping invalid event in ${filePath}`);
                 result.skipped++;
             }
         } catch (error) {
-            console.error(`❌ Failed to load event from ${filePath}:`, error);
+            logger.error(`Failed to load event from ${filePath}:`, error);
             result.errors.push({ file: filePath, error });
         }
     }