template repo infrastructure

[luzpaz]

• Create repo
• Devise contribution/PR guidelines
  • Licensing requirements adding template to repo
  • Description uniformity
  • Screenshot guidlines
  • Hash
• Template deployment
  • Coordinate with @aoloe and aoloe/scribus-script-repository
• Repository structure
  • A 1.4.x and 1.5 section?
  • Way for people to request templates from the community
• Announce the repo