Set up schema for plans

[joepie91]

Requirements:

• Various plans with different pricing
• Different set of 'base templates' for each plan (no inheritance of 'template set' based on plans, as each plan has its own version of a common template)
• Feature flags per plan
  • Features dependent on core
  • Custom domain (dependent due to the build/configuration process)
  • Features that can be implemented as a template/widget feature
  • Theme colour changes
  • Extra fonts
  • Photo library
  • Hero customization
  • About section
  • Social links
  • Gallery (amount)
  • Media relations info
  • Testimonials
  • Contact info
  • PDF resume
  • Opt-out
  • Social feed
  • Press mentions
  • Blog
  • Calendar

[joepie91]

Partially completed - the plans table exists, but feature flags still need to be added in some manner.