feat!: Add Body type #3625

Job	Run time
rustfmt	6s
cargo-deny check	24s
codegen	23s
Check unused dependencies	4m 32s
check (ubuntu-latest)	2m 27s
check (macOS-latest)	2m 41s
clippy	51s
check (windows-latest)	5m 9s
check-external-types	30s
Check MSRV	42s
Interop Tests (ubuntu-latest)	47s
semver	1m 11s
Interop Tests (macOS-latest)	50s
Interop Tests (windows-latest)	3m 2s
test (ubuntu-latest)	3m 5s
test (macOS-latest)	1m 58s
test (windows-latest)	6m 42s
	35m 20s

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