Add methods for getting Image pixel rects #51055

Job	Run time
build (windows-latest)	6m 59s
ci	2m 49s
check-bevy-internal-imports	4s
build (ubuntu-latest)	2m 30s
check-doc	7m 20s
build (macos-latest)	3m 40s
check-missing-examples-in-docs	34s
miri	9m 55s
toml	1m 53s
typos	6s
check-missing-features-in-docs	29s
markdownlint	1m 11s
check-compiles	4m 48s
check-compiles-no-std	19s
msrv	55s
build-wasm-atomics	1m 36s
build-wasm	51s
	45m 59s

Provide feedback