Added the created and last modified date to pages (dev)

[bernattorras]

Changes proposed in this Pull Request

• Added the Page created on January 31, 2023 | Last modified on January 25, 2023 string to the bottom of all pages that:
  • Are not homepage
  • Were created before Feb 2023

Testing instructions

• Open any page that was created before Feb 2023 from the Frontend
• Confirm that the Page created on .... | Last modified on ... text appears at the bottom of the page
• Create a new page (draft for example) and confirm that this text doesn't appear there (as the page was created after Feb 2023)
• Confirm that this text isn't appearing in the homepage.

Screenshot

Notes / Considerations

• This feature has been applied to the default page template and the No Page Header template as this last template was also used for the following pages:
  • Home Page
  • About old
  • About
  • Programs
  • Home Page - License clinic
  • Legal Program
  • [ClearlyDefined
  • Policy and standards program
  • Home Page - standard
  • Practical Open Source
  • Deep Dive
  • The Open Policy Alliance
  • Home Page - DDAI
• The Home (and Front) page are always excluded by a conditional

Dev deploy for #9

[bernattorras]

I'm merging into develop to test the changes from the staging site.