How to access enum types?

[jessicamcinchak]

Currently, we're encoding some very long enum types directly into the schema - see definitions for "ProjectType" & "PropertyType" as examples.

Open questions:

• As consumers of the schema, is it useful to have these directly encoded in the single JSON Schema doc for reference / to do lookups against?
• Would it be easier to access via another query to an external service? What are central, open hosting options?
• What are maintance considerations of either approach when values & descriptions need to be updated?

[jessicamcinchak]

See these examples for how we're accessing enums within Planx editor to do flow validation on publish:

• feat: get and export original enum values from json schema spec  planx-core#436
• feat: add ODP Schema validation example for FileTypes to publish checks planx-new#3373

[jessicamcinchak]

Closing this for now as this hasn't come up in external feedback & would be slightly addressed by a public validation endpoint #116