[docs] editor API (#1328)

This PR adds a basic guide to the editor API.

### Release Note

- (docs) Add a basic guide to the editor API.

apps/docs/components/mdx-components/index.ts

@@ -46,6 +46,8 @@ export const components = {
 	li: ListItem,
 	img: Image,
 	Small: Small,
+	Image,
+	Video,
 	...customComponents,
 	...apiComponents,
 }