Specify tags in decorator

[diasdm]

What do these changes do?

Allow to specify tags in the decorator:

@SCHEMA.api(tags=["UseCase"])

Are there changes in behavior for the user?

If tags is not specified the behavior is the same, when it is the paths will be grouped

Checklist

• I think the code is well written
• Unit tests for the changes exist
• Documentation reflects the changes

If there's interest I don't mind adding tests add documentation

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.86%. Comparing base (7751c9f) to head (0a3b58b).
Report is 29 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #57      +/-   ##
==========================================
+ Coverage   96.70%   96.86%   +0.15%     
==========================================
  Files           5        5              
  Lines         395      415      +20     
  Branches       56       37      -19     
==========================================
+ Hits          382      402      +20     
  Misses          5        5              
  Partials        8        8              

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[diasdm]

I think the last commit matches the requested changes, let me know if it fits

[Dreamsorcerer]

Thanks a lot for that.

[Dreamsorcerer]

Forgot the docs. If you have a moment to send a followup PR to add the parameter to the docs, that'd be great.