HIFIS unified step 1

"Step 1" of merging software.hifis.net and hifis.net as discussed in VC 2021-03-17.

• Page review. This is the version to be published asap, once finished.
  • Blocking issues that need to be resolved before publishing
  • Further issues on this
• Variant with quickstart lane + success button: Page review. This variants needs additional content -> to be added later.
• Mockup from 2021-03-17, outside of blue box