Orchestrate gitbuilding

[julianstirling]

This PR is to:

• [x] Update static GitBuilding files in repository using files from [the example documentation])https://github.com/Wakoma/nimble-example-documentation)
• [x] Create a dummy GitBuilding pages from Orchestration
• [x] Build documentation from generate.py
• [x] Run generate.py in CI
• [x] Create correct shelves for named components if shelf type exists.

[julianstirling]

GitBuilding now generates a markdown file for each shelf. This runs on the sever and is linked to from the index page we host on github pages.

There is a lot more to do. But I think this is enough changes for one PR.