- Bump version: 10.0.26 → 10.0.27

- Fix dracut-interactive with systemd 256
With systemd 256, /usr (and thus also /bin/) is read-only in the initrd.
Move dracut-interactive and its .service into /run instead.

- Bump version: 10.0.25 → 10.0.26

- Revise scripts_testing.rst

- Revise schema_extensions.rst

- Pass kernel cmdline to agama
In the agama integration test make sure to pass along
the kernel boot parameters to allow controlling the
behavior of agama better

- Add directive to incorporate custom files
Usually custom files are managed by placing them as overlay
files or archives. However, overlay files must be structured
inside of a root/ subdirectory and archive files are binary
data. It is therefore not straight forward to just reference
one or more files as source files to the image description
to be placed into the image. This commit adds a new
element which allows to do this. This Fixes #1953

- kiwi_plugin_architecture.rst

- Revise kiwi_from_python.rst