feat: ✨ allow file type to be called with unslashed dir path

[stormslowly]

before

zip.file_type("node_modules") returns Error NotFound
zip.file_type("node_modules/") returns Directory

after

zip.file_type("node_modules") returns Directory
zip.file_type("node_modules/") returns Directory

background

try to resolve ./devtools from preact-xxxxxx.zip/node_modules/preact

zip.file_type("node_modules/preact/devtools") returns NotFound, results in rspack-resolve failed.

[stormslowly]

@arcanis could you plz have a look

[stormslowly]

in my opinion when the path is inside a zip file, resolver can not normalize that correctly before call zip apis.

For example, xxxxx.zip/node_modules/some-npm/README resolver don't know it is a file or dir, so it can not normalize that then to call file_type api ; or just try both xxxxx.zip/node_modules/some-npm/README and xxxxx.zip/node_modules/some-npm/README/

[arcanis]

While I understand the pickle, my problem is that I don't understand (haven't been able to dig too deep yet) why it seems to work in rspack but not in your case.

For instance if we do require('typanion/lib'), it works fine in rspack even without this trailing / - and we don't seem to do anything magic. So I wonder if there's something I forgot that would make this a non-issue.