Add new `treefile-apply` experimental command #3180

Job	Run time
Build	7m 52s
cargo-deny	22s
Build (c9s)	11m 50s
Build Integration Test Data	53s
Verify CXX generation	1m 31s
Differential ShellCheck	14s
Container Integration	0s
Compose tests	0s
compose-image tests	0s
compose-rootfs tests	0s
Container build	0s
Encapsulate tests	0s
experimental build-chunked-oci tests	0s
	22m 42s

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