HCAP-1401: Add types to server services directory

[rhattie-ey]

This PR:

• Converts all server services files to TypeScript
• Adds stronger typing across much of the services directory
• Converts a couple constant objects into enums
• Refactors the following files into multiple smaller ones:
  • participants-helper
  • participants
  • reporting
  • participant-status
    • setParticipantStatus was further refactored into multiple smaller functions for readability
• Fixes an ESLint bug with enums

This PR does not:

• Achieve 100% strong typing across services. It's a huge directory, and certain parts of it are very time consuming to untangle. Some parts will just need to go un-annotated for now. Everyone is encouraged to continue tightening up types when possible.
• Fully refactor services. Again, huge directory, and that's out of scope for this ticket. This PR does work in a few refactors, though.

[vanics]

I love your attention to details and your dilligence improving the code base. Well done! It looks great. The change was considerable, I skimmed here but will open locally to explore more but so far what I've seem is really god.

[sonarcloud[bot]]

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