chore: drop Python 3.7 & use uv #686

Job	Run time
run-pre-commit	13s
run-clippy	35s
macos (macos-13, x86_64-apple-darwin)	3m 30s
linux (x86_64-unknown-linux-gnu)	3m 35s
macos (macos-14, aarch64-apple-darwin)	2m 50s
run-rustfmt	12s
linux (i686-unknown-linux-gnu)	4m 3s
sdist	8s
linux (aarch64-unknown-linux-gnu)	3m 31s
windows (x86_64-pc-windows-msvc, x64)	2m 22s
linux (armv7-unknown-linux-gnueabihf)	3m 0s
windows (i686-pc-windows-msvc, x86)	5m 11s
linux (powerpc64le-unknown-linux-gnu)	3m 54s
linux (powerpc64-unknown-linux-gnu)	3m 46s
linux (s390x-unknown-linux-gnu)	3m 59s
linux (x86_64-unknown-linux-musl)	3m 0s
linux (i686-unknown-linux-musl)	2m 32s
linux (aarch64-unknown-linux-musl)	2m 11s
linux (armv7-unknown-linux-musleabihf)	2m 38s
release	1s
	51m 11s

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