This adds the `fedora-image-installer` and
`fedora-image-installer-preview` images.
The image installer type installs anaconda-webui on Fedora >= 38 to use
the new UI. It also writes its setting to
`/usr/share/anaconda/interactive-defaults.ks` as the current
anaconda-webui has not yet been tested in kickstart mode.
To do so manifest.Anaconda was expanded to take a (subset) of options
for a KickstartStage which is will write into interactive-defaults.ks.
And to take a list of additional modules to enable, so we can set up
Anaconda with all default modules.
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