v0.7.0

Added

• Support for defining a contents index in the index.md file.
• Support for hidden items on the contentx index.
• Support for external items on the contents index
• Automatically moving the discourse-gatekeeper/content tag when the
  documentation is up to date with discourse

Fixed

• Navigation table not getting removed if the contents was hidden using the
  [details=...]...[/details] tag.
• No longer use empty values from INPUT_COMMIT_SHA instead of reading the
  event/ environment
• Removing leading and trailing whitespace in base content for comparison
• Correct failing pre-flight checks due to shallowly checked out repos