chore: update project structure and enhance plugin functionality

- Added new entries to .gitignore for database files.
- Updated go.mod and go.sum to include new indirect dependencies for database and ORM support.
- Refactored event handling to improve message reply functionality in the protocol.
- Enhanced the dispatcher to allow for better event processing and logging.
- Removed outdated plugin documentation and unnecessary files to streamline the codebase.
- Improved welcome message formatting and screenshot options for better user experience.

internal/plugins/welcome/welcome.go

@@ -317,8 +317,8 @@ func buildWelcomeMessage(ctx context.Context, userID, operatorID interface{}, su
 
 	// 配置截图选项
 	opts := &utils.ScreenshotOptions{
-		Width:    800,
-		Height:   600,
+		Width:    1200,             // 增加宽度，确保内容有足够空间
+		Height:   800,              // 增加高度，确保内容完整显示
 		Timeout:  60 * time.Second, // 增加超时时间到60秒
 		WaitTime: 3 * time.Second,  // 增加等待时间，确保页面完全加载
 		FullPage: false,