feat(patch_set): support git diff application #191

Job	Run time
semver	11s
lint	17s
test (beta)	21s
test (nightly)	21s
test (1.70.0)	23s
test (stable)	13s
replay (diffy) / unidiff	16s
replay (diffy) / gitdiff	16s
replay (rust-lang/rust) / unidiff	1m 0s
replay (rust-lang/rust) / gitdiff	39s
replay (rust-lang/cargo) / gitdiff	23s
replay (rust-lang/cargo) / unidiff	25s
	4m 45s

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