Add support for Trace-Context

[qligier]

Closes #94

📑 Description

This PR adds two codes to the BasicAuditEntityType CodeSystem and the BasicAuditEntityTypesVS ValueSet: Traceparent and Tracestate. The slicing is updated, an exemple is modified to use traceparent instead of XrequestId and the documentation is updated accordingly.

✅ Checks

• My pull request adheres to the code style of this project
• My code requires changes to the documentation
• I have updated the documentation as required
• All the tests have passed
• I have selected a committee co-chair to review the PR

ℹ Additional Information

[qligier]

Hi @JohnMoehrke! What do you think of this proposition? What would be the next step to fix the linked issue?

[JohnMoehrke]

will add this to the next CP call.

[JohnMoehrke]

CP-ITI-1303

[JohnMoehrke]

There is interest, but the changes are big enough to require CP processing. The CP can refer to this Pull-Request, but the CP does need to be drafted with rational for the change.

[JohnMoehrke]

@qligier can you prepare ITI-CP-1303 for a CP Ballot as discussed above?