fix(SIGN): rename signe struct

[BenPinet]

No description provided.

[github-actions]

Cpp-Linter Report ⚠️

Some files did not pass the configured checks!

clang-tidy (v20.1.8) reports: 7 concern(s)

• src/geode/inspector/inspection/criterion/negative_elements/solid_negative_elements.cpp:42:9: warning: [google-explicit-constructor]

  single-argument constructors must be marked explicit to avoid unintentional implicit conversions

     42 |         Impl( const SolidMesh< dimension >& mesh ) : mesh_( mesh ) {}
        |         ^
        |         explicit 

• src/geode/inspector/inspection/criterion/negative_elements/solid_negative_elements.cpp:44:9: warning: [modernize-use-nodiscard]

  function 'mesh_has_negative_elements' should be marked [[nodiscard]]

     44 |         bool mesh_has_negative_elements() const
        |         ^
        |         [[nodiscard]] 

• src/geode/inspector/inspection/criterion/negative_elements/solid_negative_elements.cpp:56:9: warning: [modernize-use-nodiscard]

  function 'negative_polyhedra' should be marked [[nodiscard]]

     56 |         InspectionIssues< index_t > negative_polyhedra() const
        |         ^
        |         [[nodiscard]] 

• src/geode/inspector/inspection/criterion/negative_elements/solid_negative_elements.cpp:73:9: warning: [modernize-use-nodiscard]

  function 'polyhedron_has_negative_volume' should be marked [[nodiscard]]

     73 |         bool polyhedron_has_negative_volume( index_t polyhedron_id ) const
        |         ^
        |         [[nodiscard]] 

• src/geode/inspector/inspection/criterion/negative_elements/surface_negative_elements.cpp:43:9: warning: [google-explicit-constructor]

  single-argument constructors must be marked explicit to avoid unintentional implicit conversions

     43 |         Impl( const SurfaceMesh< dimension >& mesh ) : mesh_( mesh ) {}
        |         ^
        |         explicit 

• src/geode/inspector/inspection/criterion/negative_elements/surface_negative_elements.cpp:45:9: warning: [modernize-use-nodiscard]

  function 'mesh_has_negative_elements' should be marked [[nodiscard]]

     45 |         bool mesh_has_negative_elements() const
        |         ^
        |         [[nodiscard]] 

• src/geode/inspector/inspection/criterion/negative_elements/surface_negative_elements.cpp:61:9: warning: [modernize-use-nodiscard]

  function 'negative_polygons' should be marked [[nodiscard]]

     61 |         InspectionIssues< index_t > negative_polygons() const
        |         ^
        |         [[nodiscard]] 

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