chore(docs): update renderer children documentation

Author: Hyperkid123

packages/react-renderer-demo/src/pages/components/children.md

@@ -8,6 +8,23 @@ import DocPage from '@docs/doc-page';
 
 ## Props
 
+Children are supplied with `formFields` and `schema` props. If a child has one of `schema` or `formFields` prop explicitly set, the explicit props will be used.
+
+```jsx
+
+/**
+ * The ChildComponent will receive schema and formFields props from the FormRenderer.
+ */
+<FormRenderer {...props}><ChildComponent/></FormRenderer>
+
+
+/**
+ * The ChildComponent will not receive schema prop from the FormRenderer! The schema prop will be equal to "Foo".
+ * It will still receive the formFields prop from the renderer.
+ */
+<FormRenderer {...props}><ChildComponent schema="Foo"/></FormRenderer>
+```
+
 ### formFields
 
 *node*

packages/react-renderer-demo/src/pages/hooks/use-form-api.md

@@ -26,6 +26,12 @@ This hook returns object containing following information:
 
 If you want to render fields from a component (`tabs`, `subform`, etc.) you can use `renderForm(fields)` function.
 
+## schema
+
+*object*
+
+The [schema prop](/components/renderer#schema) of FormRenderer.
+
 ## getState
 
 *() => FormState*