feat!: Add Body type #3564

Job	Run time
clippy	1m 15s
check-external-types	53s
check (ubuntu-latest)	3m 2s
codegen	42s
check (macOS-latest)	4m 34s
cargo-deny check	22s
Interop Tests (ubuntu-latest)	59s
check (windows-latest)	4m 49s
Interop Tests (macOS-latest)	1m 20s
Check MSRV	53s
rustfmt	12s
Interop Tests (windows-latest)	3m 2s
semver	55s
test (ubuntu-latest)	3m 20s
Check unused dependencies	4m 7s
test (macOS-latest)	2m 54s
test (windows-latest)	5m 17s
	38m 36s

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