feat: support "server-info" OOB request

[unknwon]

Describe the pull request

Support "server-info" OOB request, currently only contains the host URL which could be printed to the client console.

Consent

• I agree to follow the Code of Conduct by submitting this pull request.
• I have read and acknowledged the Contributing guide.
• I have added test cases to cover the new code or have provided the test plan.

Test plan

[codecov]

Codecov Report

Merging #34 (e2297cc) into main (e668de1) will increase coverage by 4.29%.
The diff coverage is 33.92%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #34      +/-   ##
==========================================
+ Coverage   12.46%   16.75%   +4.29%     
==========================================
  Files          11       12       +1     
  Lines         345      370      +25     
==========================================
+ Hits           43       62      +19     
- Misses        299      303       +4     
- Partials        3        5       +2