rename Minetest to Luanti

[heavygale]

Minetest got renamed to Luanti, see https://blog.minetest.net/2024/10/13/Introducing-Our-New-Name/

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[Ki-er]

Will they be changing the github to Lunati too. If so I think we should hold this for a couple days until they change it over.

[heavygale]

Yes, they plan to move to https://github.com/luanti-org
The name was changed 2 month ago, I don't know how long it will take them to also move the repos to the new organization.