Changes to Create Checkout

removed the enum value physical of the request property plan

removed the enum value pro of the request property plan

removed the enum value realtime of the request property plan

added the new basic_2026 enum value to the request property plan

added the new plus_2026 enum value to the request property plan

added the new pro_2026 enum value to the request property plan

removed the enum value basic_2026 of the request property plan

removed the enum value plus_2026 of the request property plan

removed the enum value pro_2026 of the request property plan

added the new basic_2026 enum value to the request property plan

added the new plus_2026 enum value to the request property plan

added the new pro_2026 enum value to the request property plan

endpoint added