feat(json-schema-2020-12): add support for type keyword

Refs #8513

src/core/plugins/json-schema-2020-12/fn.js

@@ -1,7 +1,6 @@
 /**
  * @prettier
  */
-
 export const upperFirst = (value) => {
   if (typeof value === "string") {
     return `${value.charAt(0).toUpperCase()}${value.slice(1)}`
@@ -17,4 +16,16 @@ export const getTitle = (schema) => {
   return ""
 }
 
+export const getType = (schema) => {
+  if (Array.isArray(schema.type)) {
+    return schema.type.map(String).join(" | ")
+  }
+
+  if (schema.type != null) {
+    return String(schema.type)
+  }
+
+  return "any"
+}
+
 export const isBooleanJSONSchema = (schema) => typeof schema === "boolean"