adding assessment order

[edeyoung]

adding assessment order. no new attributes required for the 'assessment' type.

Pull requests into Health Data Standards require the following. Submitter and reviewer should :white_check_mark: when done. For items that are not-applicable, note it's not-applicable ("N/A") and :white_check_mark:.

Submitter:

• [x] This pull request describes why these changes were made.
• [x] This PR is into the correct branch.
• [x] Internal ticket for this PR: https://jira.mitre.org/browse/BONNIE-1599
• [x] Internal ticket links back to this PR
• [x] Code diff has been done and been reviewed (it does not contain: additional white space, not applicable code changes, debug statements, etc.)
• [x] ~Tests are included and test edge cases~
  • effective testing of this code requires examples of assessment, order which we do not yet have.
• [x] Tests have been run locally and pass
• [x] Code coverage has not gone down and all code touched or added is covered.
  • bonnie-v3.0: 90.49
  • this branch: 90.49

Cypress Reviewer:

Name: Dave Czulada

• [x] Code is maintainable and reusable, reuses existing code and infrastructure where appropriate, and accomplishes the task’s purpose
• [x] The tests appropriately test the new code, including edge cases
• [x] You have tried to break the code

Bonnie Reviewer:

Name: @losborne

• [x] Code is maintainable and reusable, reuses existing code and infrastructure where appropriate, and accomplishes the task’s purpose
• [x] The tests appropriately test the new code, including edge cases
• [x] You have tried to break the code