[FEATURE] Add network diagnosis cmd

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

I've been waiting for a long time, and I don't know if it's a network issue or a server issue

Proposed Solution

Add network diagnostic command

Alternative Solutions

_No response_

Priority

Critical - Blocking my work

Feature Category

CLI commands and flags

Use Case Example

_No response_

Additional Context

_No response_