vfs: add minimal node:vfs subsystem #6793

Job	Run time
Build slim tarball	1m 7s
aarch64-linux: Cache V8 build	25s
x86_64-darwin: with shared libraries	42m 12s
aarch64-darwin: with shared libraries	24m 12s
x86_64-linux: with shared libraries	27m 16s
aarch64-linux: with shared openssl-3.5.5	23m 42s
aarch64-linux: with shared openssl-3.0.19	23m 13s
aarch64-linux: with shared boringssl-0.20260413.0	23m 52s
aarch64-linux: with shared openssl-4.0.0	24m 4s
aarch64-linux: with shared openssl-1.1.1w	22m 47s
aarch64-linux: with shared openssl-3.6.1	23m 42s
	3h 56m 32s

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