API Route Request: Available flag reasons

[AWegnerGitHub]

When adding feedback via the API, you provide a type. It would be helpful if the available, acceptable, reasons were accessible via an API route.

It'd also be helpful if this route returned a human friendly description of the type.

Example output:

[
    {
        "type": "naa-",
        "description": "Not an answer (silent)"
    },
    {
        "type": "tpu-",
        "description": "True postive/Blacklist user"
    },
    ...
]