Add support for @deprecated tag

[dejankatanic]

Could we add support for deprecated attributes.

For example, the following interface:

type sample = {
  country: string;
  /** @deprecated */
  city: string:
}

should add a deprecated = true to the json attribute.

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "country": { "type": "string" },
    "city": { "type": "string", "deprecated": true }
  }
}