editoast: add .idea repository to .gitignore

[Sh099078]

[codecov-commenter]

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Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 39.62%. Comparing base (2449281) to head (c8c5dfa). Report is 5 commits behind head on dev.

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Additional details and impacted files

@@             Coverage Diff              @@
##                dev    #9467      +/-   ##
============================================
- Coverage     39.65%   39.62%   -0.04%     
  Complexity     2270     2270              
============================================
  Files          1300     1301       +1     
  Lines         99008    99071      +63     
  Branches       3282     3284       +2     
============================================
- Hits          39265    39255      -10     
- Misses        57812    57883      +71     
- Partials       1931     1933       +2     

Flag	Coverage Δ
core	74.98% <ø> (-0.02%)	:arrow_down:
editoast	73.20% <ø> (-0.05%)	:arrow_down:
front	10.23% <ø> (-0.02%)	:arrow_down:
gateway	2.50% <ø> (ø)
osrdyne	3.29% <ø> (ø)
railjson_generator	87.49% <ø> (ø)
tests	86.71% <ø> (ø)

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