Merging develop into main

• Review home page and concept index page
• Fix link to library
• Update instructions on how to contribute to documentation
• Ensure destination directory for MR deployments exists
• Set "next steps" order to be the same as in lhs nav
• Remove gitlab CI file which is now defined in a protected space
• Feature/eca set field value

enabled an automatic merge when all merge checks for c4afe141 pass

mentioned in commit 0bf055ef

merged