use `uv` build backend

[KotlinIsland]

it's still WIP, so it might not be possible

astral-sh/uv#3957

astral-sh/uv#8779

[jorenham]

blocker: astral-sh/uv#13280

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update: astral-sh/uv#13313 will fix this

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update: the glob thing should be fixed now: https://github.com/astral-sh/uv/releases/tag/0.7.4

[jorenham]

there's another blocker: astral-sh/uv#13546