Seperate templates for posts sprints and stories

Description #

Currently posts, sprints and stories all use the same template. This story is about creating seperate templates for each.

Post - Keep current template
Story - Contains description and tasks sections
Sprint - Contains stories and retrospective sections

With seperate templates it will be easier to create custom pages that pull in and display various data automatically.

Tasks #

• Create Sprint template
• Create Sprints template
• Create Story template
• Create Storis template
• Update stylesheets
• Update existing md files meta
• Update paths used in addPassthroughCopy invocations

• Next: Ensure creating new sprints is as expected
• Previous: Ensure consistent naming in navigation