Simplify `freeObject`. Add object destructor docs. #484

Job	Run time
docs	52s
host=ubuntu-22.04 cmd=cli target=x86_64-linux-gnu mode=release	4m 2s
host=ubuntu-22.04 cmd=cli target=x86_64-selinux-gnu mode=release	3m 37s
host=macos-12 cmd=cli target=x86_64-macos-none mode=release	3m 36s
host=macos-14 cmd=cli target=aarch64-macos-none mode=release	1m 58s
host=windows-2022 cmd=cli target=x86_64-windows-gnu mode=release	5m 53s
host=windows-2022 cmd=lib target=x86_64-windows-gnu mode=release	4m 48s
host=windows-2022 cmd=lib target=x86_64-windows-msvc mode=release	1m 56s
host=ubuntu-22.04 cmd=web-lib target=wasm32-freestanding mode=release	1m 25s
host=ubuntu-22.04 cmd=cli target=wasm32-wasi mode=release	1m 19s
host=ubuntu-22.04 cmd=lib target=x86_64-linux-gnu mode=release	3m 29s
host=macos-12 cmd=lib target=x86_64-macos-none mode=release	3m 11s
host=macos-14 cmd=lib target=aarch64-macos-none mode=release	1m 40s
Release	0s
	37m 46s

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