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frontend: add barebone frontend #2073

Job	Run time
build-linux (x86_64-unknown-linux-gnu, cargo)	4m 46s
build-freebsd (14.2)	20m 25s
build-linux (aarch64-unknown-linux-gnu, cross)	14m 38s
build-freebsd (13.4)	20m 49s
build-linux (x86_64-unknown-linux-musl, cross)	5m 37s
build-linux (aarch64-unknown-linux-musl, cross)	14m 7s
build-macos (x86_64-apple-darwin, macos-13, x64-osx-release)	9m 53s
build-macos (aarch64-apple-darwin, macos-14, arm64-osx-release)	4m 47s
build-windows	11m 9s
build-docker	1m 55s
upload-release	0s
	1h 48m 6s

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