Follow datatype aliases when generating a JSON Schema

[timothee-haudebourg]

Consider the following layout:

// example/basic_post.tldr
base <https://example.com/>;
use <https://schema.org/> as schema;

layout BasicPost for schema:BlogPosting {
	/// Title of the post.
	schema:title: schema:Text,

	/// Content of the post.
	schema:body: schema:Text
}

For now it generates the fololwing JSON Schema:

{
	"$id": "https://example.com/BasicPost",
	"$schema": "https://json-schema.org/draft/2020-12/schema",
	"properties": {
		"body": {
			"description": "Content of the post.",
			"$ref": "https://schema.org/Text"
		},
		"title": {
			"description": "Title of the post.",
			"$ref": "https://schema.org/Text"
		}
	},
	"title": "Basic Blog Post.",
	"type": "object"
}

However it would be preferable to replace "$ref": "https://schema.org/Text" by "type": "string" directly, by following the datatype alias.