Improve Xray Proxy Management and Configuration

- Added 'remove' subcommand for Xray proxy
- Enhanced VMESS installation with V2rayNG config generation
- Updated Xray installation process with improved error handling
- Modified vmess template to separate Clash and V2rayNG configurations
- Fixed command existence check in PackageOperator

agent-wdd/op/PackageOperator.go

@@ -220,8 +220,12 @@ func CommandExists(command string) bool {
 func CommandExistsByPath(command string) bool {
 
 	// 查询 /usr/bin /usr/local/bin中是否有可执行文件
-	ok, _ := SingleLineCommandExecutor([]string{"find", "/usr/bin", "/usr/local/bin", "-name", command})
-	return ok
+	_, result := SingleLineCommandExecutor([]string{"find", "/usr/bin", "/usr/local/bin", "-name", command})
+	if result == nil || len(result) == 0 {
+		return false
+	}
+
+	return true
 }
 
 func beautifulPrintListWithTitle(contend []string, title string) {