Add `fmt` command #296

Job	Run time
Build wheel and source distribution	16s
aarch64-unknown-linux-gnu (ubuntu-22.04)	3m 30s
x86_64-unknown-linux-gnu (ubuntu-22.04)	3m 23s
x86_64-unknown-linux-musl (ubuntu-22.04)	3m 52s
i686-unknown-linux-gnu (ubuntu-22.04)	3m 31s
powerpc64le-unknown-linux-gnu (ubuntu-22.04)	3m 49s
x86_64-pc-windows-msvc (windows-2022)	6m 18s
i686-pc-windows-msvc (windows-2022)	5m 39s
aarch64-apple-darwin (macos-12)	9m 29s
x86_64-apple-darwin (macos-12)	4m 8s
Build Windows installers	1m 14s
Build macOS installer and sign/notarize artifacts	1m 8s
Publish release	0s
	46m 17s

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