Add `ReflectKind` #35891

Job	Run time
build (windows-latest)	5m 2s
check-bevy-internal-imports	4s
build (ubuntu-latest)	1m 43s
check-doc	5m 42s
build (macos-latest)	3m 54s
check-missing-examples-in-docs	31s
ci	2m 4s
miri	6m 25s
run-examples-on-windows-dx12	12m 48s
toml	3s
check-missing-features-in-docs	30s
markdownlint	1m 10s
check-compiles	2m 12s
build-wasm	42s
msrv	57s
	43m 47s

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