vfs: add minimal node:vfs subsystem #6990

Job	Run time
Build slim tarball	1m 40s
aarch64-linux: Cache V8 build	21s
aarch64-darwin: with shared libraries	26m 33s
x86_64-linux: with shared libraries	25m 41s
x86_64-darwin: with shared libraries	32m 45s
aarch64-linux: with shared openssl-3.6.1	24m 56s
aarch64-linux: with shared openssl-1.1.1w	25m 5s
aarch64-linux: with shared boringssl-0.20260413.0	23m 20s
aarch64-linux: with shared openssl-3.5.5	25m 2s
aarch64-linux: with shared openssl-4.0.0	24m 50s
aarch64-linux: with shared openssl-3.0.19	24m 13s
	3h 54m 26s

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