Add a method for detecting changes within a certain scope #36259

Job	Run time
build (windows-latest)	5m 3s
check-bevy-internal-imports	6s
build (ubuntu-latest)	1m 50s
check-doc	6m 27s
build (macos-latest)	2m 27s
check-missing-examples-in-docs	30s
ci	1m 36s
miri	7m 29s
run-examples-on-windows-dx12	10m 49s
toml	4s
check-missing-features-in-docs	26s
markdownlint	1m 7s
check-compiles	2m 6s
build-wasm	49s
msrv	48s
	41m 37s

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