Base interface for bounding boxes compatible with RFC7946

[navispatial]

See Chapter 5 Bounding Box of the GeoJSON sepc.

• The value of the bbox member MUST be an array of length 2*n where n is the number of dimensions represented in the contained geometries, with all axes of the most southwesterly point followed by all axes of the more northeasterly point.
• sample on the antimeridian : "bbox": [177.0, -20.0, -178.0, -16.0]

[navispatial]

New definitions.

Bounding box for projected or cartesian coordinates:

/// A bounding box with [minX], [minY], [maxX] and [maxY] coordinates.
  ///
  /// Optional [minZ] and [maxZ] for 3D boxes, and [minM] and [maxM] for
  /// measured boxes can be provided too.
  const Box({
    required num minX,
    required num minY,
    num? minZ,
    num? minM,
    required num maxX,
    required num maxY,
    num? maxZ,
    num? maxM,
  });

Bounding box for geographic coordinates.

  /// A geographic bounding box with [west], [south], [east] and [north] values.
  ///
  /// West and east represents geographic longitude coordinates values. South
  /// and north represents geographic latitude coordinates values.
  ///
  /// For geographic bounding boxes `(west-longitude, south-latitude)` position
  /// represents the most **southwesterly** point, and
  /// `(east-longitude, north-latitude)` position represents the more
  /// **northeasterly** point. When a bounding box spans the antimeridian, it's
  /// possible that "min-longitude" (west) is larger than "max-longitude" (east)
  /// as a number. See also RFC 7946 chapter 5 about bounding boxes in GeoJSON
  /// for reference.
  ///
  /// Optional [minElev] and [maxElev] for 3D boxes, and [minM] and [maxM] for
  /// measured boxes can be provided too.
  const GeoBox({
    required double west,
    required double south,
    double? minElev,
    double? minM,
    required double east,
    required double north,
    double? maxElev,
    double? maxM,
  });

[navispatial]

Implemented and published on the new geobase package (pre-release 0.1.0-a.0).