front: source extension for editor

[sim51]

See message in #384
Fix #7314

• remove source edition if object has no source data
• if object has source data, on form, source are readonly
• add source data on entity sumup

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 48 lines in your changes are missing coverage. Please review.

Project coverage is 28.92%. Comparing base (c2a5fa9) to head (1685da8).

Files	Patch %	Lines
.../trackEdition/components/TrackEditionLeftPanel.tsx	0.00%	33 Missing and 1 partial ⚠️
...src/applications/editor/components/EntitySumUp.tsx	0.00%	13 Missing and 1 partial ⚠️

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Additional details and impacted files

@@             Coverage Diff              @@
##                dev    #7323      +/-   ##
============================================
- Coverage     28.94%   28.92%   -0.02%     
  Complexity     2004     2004              
============================================
  Files          1126     1126              
  Lines        138733   138777      +44     
  Branches       2684     2684              
============================================
- Hits          40152    40146       -6     
- Misses        96984    97034      +50     
  Partials       1597     1597              

Flag	Coverage Δ
core	78.37% <ø> (ø)
editoast	72.03% <ø> (-0.03%)	⬇️
front	9.32% <0.00%> (-0.01%)	⬇️
gateway	2.43% <ø> (ø)
railjson_generator	87.49% <ø> (ø)
tests	83.96% <ø> (ø)

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[clarani]

LGTM ✅ tested