community/blender-shared: include essential assets library

Blender is commonly packaged including a standard asset catalog. Atm we miss the really common "smooth by angle" feature.

Archlinux also fixed this in their recipe repo: https://gitlab.archlinux.org/archlinux/packaging/packages/blender/-/commit/80254b9abc0123fa0664ebe7c0da9716fc375627

They also mention the related commit from blender: https://projects.blender.org/blender/blender/commit/3dc832a90415635c8387ba641d7722a9fd1e236c

This folder has been moved to a separate repository, using lfs.

We can just include the directory from a regular tag build tarball.