Release 1.5.0

• Add TWO_DIRECTIONS implementation in AngularSeparation and wgc-angular-separation cli (#11)
• Add PhaseAngle, PointingDirection, TangentPoint endpoints (with their respective cli) (#12)
• Add not implemented error on GeometryFinder missing endpoints (#12)
• Add Payload and Directions classes (#11)
• Add __eq__ method to compare payload directly with a dict (#12)
• Simplify and clean up payload tests (#12)
• Bump python min version to 3.11 (#10)
• Bump requests version (#9)
• Bump API version (#12)
• Update ReadTheDocs configuration (#12)