Add a Playbook to a Content Pack

Cortex XSIAM steps for adding a playbook to a content pack.

Use the demisto-sdk download --item-type Playbook -i "PLAYBOOK NAME" to add a playbook to a content pack.

Playbook triggers should be added to the content pack Triggers folder.

Currently, Cortex XSIAM does not support exporting playbook triggers into the Content repo unless you turn on a feature flag.