Better organization for the future to build a PDF etc. cause images need to be pulled from the right type for quality rendering. Currently, not being used but will be useful in the future and plus the organization now doesn't hurt by any means, only makes the "code" cleaner.
We put all the QMD files under their own directory structure. The directory contains the QMD file and also an images directory, so each chapter is now self-contained
As part of this reorg, I updated the links to images etc. to make sure they are all pointing to the right location
