Task Description (Required)

In order to better control changes between the supporting resource repositories (ai-lab-app and ai-lab-samples), we need to add a toggle that is disabled by default to include supporting repository change pull operations during a run of generate.sh.

Adding a environment variables such as IMPORT_SAMPLES and IMPORT_GITOPS with control logic that runs the corrsponding import scripts if these the environment variable is set to true when running generate.sh should be enough to achieve this result.

In addition to the script changes, we should update the documentation to mention this addition feature if someone needs to pull changes from the supporting repositories rather than just generate templates from the skeleton.