Packaging multiple inDesign files from sub folders into individual folders

I'm looking for a way to package multiple inDesign files that are in sub-folders of a main project folder.

We tested inDesign's Book feature and while you can drag in multiple inDesign files and package them all, they are all packaged into one main target folder.

I would like to select the main project folder and have the script go through and open all the inDesign files in the sub folders and do the following:

1. Open each inDesign file,

2. Update all the links,

3. Package each inDesign file to its own individual sub-folder, with all the image and text links into their own folders within the folder that contains the packaged inDesign file.