feat(patch_set): support git diff application #189

Job	Run time
test (nightly)	21s
semver	8s
lint	17s
test (stable)	12s
test (beta)	21s
test (1.70.0)	24s
replay (rust-lang/rust) / unidiff	52s
replay (rust-lang/cargo) / unidiff	23s
replay (diffy) / unidiff	17s
	3m 15s

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