Add bevy_dev_tools crate #38168

Job	Run time
build (windows-latest)	7m 13s
ci	3m 21s
build (ubuntu-latest)	3m 42s
build (macos-latest)	3m 40s
check-bevy-internal-imports	4s
check-cfg	1m 50s
check-doc	7m 45s
check-missing-examples-in-docs	38s
miri	5m 46s
run-examples-macos-metal	5m 26s
toml	2m 11s
typos	8s
check-missing-features-in-docs	48s
markdownlint	1m 10s
check-compiles	4m 3s
build-wasm	1m 18s
msrv	1m 38s
	50m 41s

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