Create mapping for HL7 CP -> FHIR extension -> HL7 CP

[mkalish]

User Story

As a user, I would like to have ADT data correctly mapped to FHIR and then back to HL7

Description/Use Case

ADT contains the CP datatype but it does not having an entry in the mapping inventory so an extension will need to be created for it

Risks/Impacts/Considerations

• IN1.40 is a ST in 2.7.1

Dev Notes

• See how MOC was handled as an example
• IN1.40 is an CP

Acceptance Criteria

• [ ] CP datatypes in an ADT_* message are mapped to an extension and then map into HL7 without any data loss

[MichaelEsuruoso]

Hey team! Please add your planning poker estimate with Zenhub @adegolier @arnejduranovic @david-navapbc @jack-h-wang @JFisk42 @kant777 @mkalish @thetaurean