Flexporter mapping for 130 and initial README

[lmd59]

Summary

Adds initial flexporter mapping for qicore which addresses specific data elements required for CMS130. Also adds README explaining initial flexporter mapping process and recommendations for the future.
Note: Recommended future tasking could involve creating a script to pull synthea in here and run flexporter mappings for bulk data generation. Some scripting could also be created to streamline the mapping creation process.

New behavior

Synthea run with flexporter mapping creates data that is conformant enough to qicore for the purposes of CMS130 calculation.

Code changes

Creates flexporter mapping files and README file.

Testing guidance

Read through the README, run the synthea flexporter with something like ./run_synthea -fm qicore_130.yaml. Look at the output patient file and confirm that the appropriate resources and fields are exported. You can create additional patients with the -p {populationSize} option. You can run resulting patients through fqm-execution calculations with CMS130 and make sure they calculate appropriately.

[github-actions]

Coverage report

St.❔	Category	Percentage	Covered / Total
🟡	Statements	75.63%	574/759
🟡	Branches	63.19%	206/326
🟡	Functions	75.83%	91/120
🟡	Lines	75.87%	566/746

Test suite run success

95 tests passing in 8 suites.

Report generated by 🧪jest coverage report action from 8c41dcc

[hossenlopp]

For some reason running with this mapping causes the output to not have the id fields on many of the resources. This causes issues when running with fqm-execution as the ids are necessary for proper execution.

[lmd59]

For some reason running with this mapping causes the output to not have the id fields on many of the resources. This causes issues when running with fqm-execution as the ids are necessary for proper execution.

This is a bug in flexporter, which is fixed by this PR: synthetichealth/synthea#1501.

[elsaperelli]

I could be misunderstanding the purpose of must supports, but there were some must supports that were not present on the generated patient's resources.

Other than that, just some small feedback!

[elsaperelli]

Thank so much for answering all my questions! Really helped me get a better understanding of this :)

With that said, LGTM!