Add model v2 macro to editoast

[leovalais]

Part of #4184

• ModelV2 derive macro
• Retrieve, Update, Create, Delete, DeleteStatic, Save traits
• Patch<'a, Model> objects
• Builder generation
• Previsional attributes json and geo
• Partial port of the Document model
  • only the tests use the old model because it would otherwise require two similar but different TestFixture objects

Things left to do:

• Batch operations : editoast: add batch operations support in the new Model derive macro #5055
• InfraModel : editoast: generate specific interfaces for infra objects models #4807
• Implement #[model(json)] attribute macro
• Maybe geo as well
• Add a #[model(to_string)] attribute macro
• Add a #[model(diesel(...))] directive to forward diesel configuration at both type and field level (useful for belongs_to among other things)
• Design a way to directly include foreign refs in the model struct (e.g.: have a study: Study field in the Project model instead of a project_id in Study)

Schema (may be probably 100% accurate, more or less):

(The red tag means that it's generated by the macro, the export deleted the text 😢)

[codecov]

Codecov Report

Attention: 92 lines in your changes are missing coverage. Please review.

Comparison is base (459de94) 19.73% compared to head (5a65ca3) 19.83%.
Report is 2 commits behind head on dev.

Files	Patch %	Lines
editoast/editoast_derive/src/modelv2.rs	78.40%	38 Missing ⚠️
editoast/src/modelsv2/mod.rs	24.32%	28 Missing ⚠️
editoast/src/views/rolling_stocks/mod.rs	0.00%	12 Missing ⚠️
editoast/src/views/projects.rs	0.00%	5 Missing ⚠️
editoast/editoast_derive/src/lib.rs	0.00%	3 Missing ⚠️
editoast/src/models/projects.rs	0.00%	3 Missing ⚠️
editoast/src/models/mod.rs	0.00%	2 Missing ⚠️
editoast/src/views/documents.rs	93.75%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##                dev    #5033      +/-   ##
============================================
+ Coverage     19.73%   19.83%   +0.09%     
  Complexity     2117     2117              
============================================
  Files           910      912       +2     
  Lines        108673   108904     +231     
  Branches       2663     2663              
============================================
+ Hits          21452    21606     +154     
- Misses        85650    85727      +77     
  Partials       1571     1571              

Flag	Coverage Δ
editoast	69.14% <63.92%> (-0.08%)	⬇️

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[flomonster]

Thanks! LGTM.

We could improve the error handling of the macro.

[Tguisnet]

LGTM

[leovalais]

Go 🚀