project: import image-builder

[supakeen]

Automatically import image-builder's doc/ subdirectory into the project pages.

[supakeen]

Needs fixes in image-builder's docs as well (fill in URLs in FAQ).

[schuellerf]

This seems really confusing that it's called "image-builder" same as https://osbuild.org/docs/developer-guide/projects/image-builder/
although I know that the package is called image-builder, for the documentation I'd stick to the repository name which really describes better what this is (image-builder-cli)
Although would be fine with renaming image-builder to image-builder-backend this will take a while and would be a duplicated name until then…

[schuellerf]

Needs fixes in image-builder's docs as well (fill in URLs in FAQ).

ref. to the fixes needed to un-draft this: osbuild/image-builder-cli#132

[schuellerf]

This seems really confusing that it's called "image-builder"

Update to our conclusion: The "backend" aka "middleware" aka "image-builder" is now called "image-builder-crc" to avoid confusion