Suggest smarter cloning

[MTRNord]

Using --filter=blob:none offers a smaller download size while not having a shallow clone in the end. This should reduce the issue of the size of the repository.

See https://github.blog/open-source/git/get-up-to-speed-with-partial-clone-and-shallow-clone/ and https://nayak.io/posts/git-clone-optimizations/ for the technical details.

Repo size without:

❯ git count-objects -vH
count: 0
size: 0 Bytes
in-pack: 69431
packs: 2
size-pack: 1.18 GiB
prune-packable: 0
garbage: 0
size-garbage: 0 Bytes

Reposize after:

❯ git count-objects -vH
count: 0
size: 0 Bytes
in-pack: 46580
packs: 2
size-pack: 612.00 MiB
prune-packable: 0
garbage: 0
size-garbage: 0 Bytes

a gc does not help us here as it would be only local.

This does have the tradeoff of slower git blame. But I hope this is not too much of an issue in reality for most contributors.

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