Fedora 42 template

[marmarek]

Fedora 42 (https://fedorapeople.org/groups/schedule/f-42/f-42-key-tasks.html) is planned for mid April 2025.

Tasks:

• build all packages
• update rpmfusion to final released version
• build the template
• document
• upload to testing repo
• migrate to stable repo
• announce

If any issue affects Fedora 42 specifically (build failures, things that worked fine before etc.), please add reference to this issue too.