Implement import.meta.dirname/filename in NMR

[jasnell]

Add import.meta.dirname and import.meta.filename to new module registry import.meta support

[ask-bonk]

I'm Bonk, and I've done a quick review of your PR.

This PR adds import.meta.dirname and import.meta.filename (WinterCG path helpers) for file: URL modules in the new module registry.

I posted 2 inline comments:

1. The manual reverse loop for finding the last / can be replaced with pathname.findLast('/'), which is already used in the same file (url.c++:374) and is more idiomatic. Suggestion provided.

2. The importMetaPathHelpers JS test claims to verify that non-file URL modules lack filename/dirname, but never actually asserts this — it only checks mod.default. Suggestion provided to actually export and assert those properties.

github run

[jasnell]

/ask-bonk update your review

[irvinebroque]

thank you!