Add doc URL to profile format and use it display help link.

[ghemawat]

No description provided.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 54.16667% with 11 lines in your changes missing coverage. Please review.

Project coverage is 67.22%. Comparing base (0ed6a68) to head (e59841d).
Report is 33 commits behind head on main.

Files	Patch %	Lines
internal/report/report.go	0.00%	11 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #886      +/-   ##
==========================================
+ Coverage   66.86%   67.22%   +0.35%     
==========================================
  Files          44       44              
  Lines        9824     9822       -2     
==========================================
+ Hits         6569     6603      +34     
+ Misses       2794     2772      -22     
+ Partials      461      447      -14     

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[ghemawat]

Will create new PR