add watch command for xgo

[tsingbx]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.24%. Comparing base (4b7a48f) to head (b9279e7).
Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2326   +/-   ##
=======================================
  Coverage   93.24%   93.24%           
=======================================
  Files          34       34           
  Lines       11314    11314           
=======================================
  Hits        10550    10550           
  Misses        607      607           
  Partials      157      157           

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