Feat(automation): Add script to automatically populate <File> nodes in autounattend.xml

[flobsx]

Feat(automation): Add script to automatically populate <File> nodes in autounattend.xml

• It use a template autounattend_template.xml without any <File> nodes
• The files to add in xml are stored in subdirectory files
• A mapping file is used to list files to add and set the destination in Path attribute.
• Running insert_files_to_xml.ps1 will create autounattend.xml file based on autounattend_template.xml and populate <File> nodes based on the mapping file. (This step could be automated in a CI in a future contribution)

The resulting xml should be similare to the one available before this change.

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Hi, thank you for your work! As I'm a little bit lazy and want to play with it, I made a script to help me populate the xml file woth script contents.

I'm sharing it as it may be useful or improved by the community. I'm not a Powerhsell expert and I didn't took time to buid a CI testing job so please be carefull while using it. I tested it successfully on a new Windows 11 23H2 installation.

Some content in the xml where rewrited by the powershell script (Some inline > became >) but it seems to still work as expected. Please confirm it while reviewing this PR.

[memstechtips]

Thanks for sharing this. I don't want to add this to the project at the moment, but I will leave this PR up for the future because it might be quite useful.

[flobsx]

Of course, no problem. 👍🏻