feat(json-schema-2020-12): add initial rendering engine

Refs #8513

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

@@ -0,0 +1,20 @@
+/**
+ * @prettier
+ */
+
+export const upperFirst = (value) => {
+  if (typeof value === "string") {
+    return `${value.charAt(0).toUpperCase()}${value.slice(1)}`
+  }
+  return value
+}
+
+export const getTitle = (schema) => {
+  if (schema.title) return upperFirst(schema.title)
+  if (schema.$anchor) return upperFirst(schema.$anchor)
+  if (schema.$id) return schema.$id
+
+  return ""
+}
+
+export const isBooleanJSONSchema = (schema) => typeof schema === "boolean"