editoast: TrackSectionModel & crate geos

[leovalais]

As part of the work to migrate /pathfinding endpoints to editoast.

• Adds a naive TrackSectionModel to retrieve track sections from the DB using the Model API. There is probably a smarter/more generic way to do this but that is subject for another PR.
• Replaces the basic LineString implementation with the crate geos::geojson which is a reexport of the crate geojson.
• Introduces the crate geos that can perform some operations on geometries defined using geojson objects (among other things) that will prove useful when migrating the endpoint POST and PUT /pathfinding. It uses the same underlying GEOS C lib than Django's Postgis extension.

[codecov]

Codecov Report

Merging #3836 (a6f1f9c) into dev (6bac1bf) will decrease coverage by 0.05%.
The diff coverage is 73.17%.

❗ Current head a6f1f9c differs from pull request most recent head ec17d7a. Consider uploading reports for the commit ec17d7a to get more accurate results

@@             Coverage Diff              @@
##                dev    #3836      +/-   ##
============================================
- Coverage     69.81%   69.77%   -0.05%     
  Complexity     2016     2016              
============================================
  Files           439      439              
  Lines         22001    22018      +17     
  Branches       1662     1662              
============================================
+ Hits          15361    15362       +1     
- Misses         5845     5861      +16     
  Partials        795      795              

Flag	Coverage Δ
editoast	74.65% <73.17%> (-0.31%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
editoast/src/models/mod.rs	37.03% <ø> (ø)
editoast/src/schema/mod.rs	94.64% <ø> (ø)
editoast/src/tables.rs	0.00% <ø> (ø)
editoast/src/views/pathfinding.rs	12.90% <0.00%> (-1.39%)	⬇️
editoast/src/map/bounding_box.rs	38.01% <75.00%> (+9.30%)	⬆️
editoast/src/infra_cache/mod.rs	71.84% <100.00%> (ø)
editoast/src/schema/track_section.rs	100.00% <100.00%> (+5.55%)	⬆️

... and 1 file with indirect coverage changes

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[flomonster]

Thanks for this PR! I found an error using the get_pf endpoint.

[Castavo]

The replacement of the LineString Enum is nice !
I have yet to test this

[flomonster]

LGTM! Well done!

I've tested to retrieve and delete a path.

[Castavo]

I checked both GET and DELETE (while running with cargo), it works 👌