Added missing codecov token

[springcomp]

And excluding the following files to maintain good coverage:

• jp.go
• cmd/jpgo/main.go

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.68%. Comparing base (e430401) to head (bd9f79b).
Report is 13 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #115      +/-   ##
==========================================
+ Coverage   88.51%   88.68%   +0.17%     
==========================================
  Files          15       16       +1     
  Lines        2594     2643      +49     
==========================================
+ Hits         2296     2344      +48     
- Misses        204      207       +3     
+ Partials       94       92       -2     

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