vfs: add minimal node:vfs subsystem #6729

Job	Run time
Build slim tarball	1m 22s
aarch64-linux: Cache V8 build	23s
x86_64-darwin: with shared libraries	38m 8s
aarch64-darwin: with shared libraries	29m 5s
x86_64-linux: with shared libraries	26m 47s
aarch64-linux: with shared boringssl-0.20260413.0	26m 20s
aarch64-linux: with shared openssl-3.6.1	26m 24s
aarch64-linux: with shared openssl-1.1.1w	25m 22s
aarch64-linux: with shared openssl-3.0.19	26m 3s
aarch64-linux: with shared openssl-3.5.5	25m 32s
aarch64-linux: with shared openssl-4.0.0	26m 5s
	4h 11m 31s

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