Add stage groups to product categories

Mark Pundsackrequested to merge
msp-add-teams into master
  1. Splits out product categories into 4 departments
  2. Adds multiple tentative stage groups per stage

Review app: https://msp-add-teams.about-src.gitlab.com/handbook/product/categories/

Plus other affected pages:

Changes that were reverted:

  1. Adds Defend as a stage in Sec, but comments it out so it doesn't show up on the home page and others yet.
  2. Move Secure to after Package.
Edited by Mark Pundsack

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