Update automated installation using Agama

[sounix000]

PR creator: Description

Add reference and task topics covering profile authoring, advanced storage configuration, AutoYaST profile migration, boot options, URL schemes, and the CLI, and bring the existing profile and AutoYaST compatibility references up to date with the current Agama release.

PR creator: Are there any relevant issues/feature requests?

• bsc#...
• jsc#...

PR reviewer: Checklist for editorial review

Apart from the usual checks, please double-check also the following:

• do any new files fulfill the naming conventions specified in https://github.com/SUSE/doc-modular/blob/main/templates/README.md?
• article title/structure title: does it have the required length and does it use sentence style capitalization?
• revhistory: is it up-to-date and does it follow the guidelines specified in https://documentation.suse.com/style/current/html/style-guide-db/sec-smartdocs.html#sec-revhistory?
• metadata: does it follow the guidelines specified in https://documentation.suse.com/style/current/html/style-guide-db/sec-smartdocs.html#sec-taglist-smartdocs?