add FormatPR.yml, JuliaFormatter.toml

[josemanuel22]

Fixing #32

[josemanuel22]

I suppose that to finish this correctly, we need to properly configure secrets.GITHUB_TOKEN. I think I can't do it because I don't have the necessary permissions.

[juliohm]

Thank you and sorry for the delay. Please ping me if I take more than a week to take action.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.15%. Comparing base (88beb3b) to head (44e3e7b).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #33      +/-   ##
==========================================
+ Coverage   86.23%   87.15%   +0.91%     
==========================================
  Files           7        7              
  Lines         109      109              
==========================================
+ Hits           94       95       +1     
+ Misses         15       14       -1     

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