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/cmd/xray/vmessTemplate.go

@@ -33,6 +33,5 @@ var VmessServerTemplate = `
 
 var VmessClientTemplate = `
 {"type":"vmess","name":"{{.ServerNodeName}}","server":"{{.ServerNodeAddress}}","port":{{.PORT}},"uuid":"{{.UUID}}","alterId":0,"cipher":"auto","network":"tcp"}
-
-vmess://{"v":"2","ps":"{{.ServerNodeName}}","add":"{{.ServerNodeAddress}}","port":{{.PORT}},"id":"{{.UUID}}","aid":0,"scy":"auto","net":"tcp"}
+{"v":"2","ps":"{{.ServerNodeName}}","add":"{{.ServerNodeAddress}}","port":{{.PORT}},"id":"{{.UUID}}","aid":0,"scy":"auto","net":"tcp"}
 `