chore: add comment

Author: kermanx

packages/types/src/types.ts

@@ -31,6 +31,9 @@ export interface SourceSlideInfo extends SlideInfoBase {
   contentStart: number
   end: number
   raw: string
+  /**
+   * Raw content before being processed by preparsers (if any)
+   */
   contentRaw: string
   /**
    * Slides import by this slide.