It was crashing with not a function error when accessing the remote FS using, for example, the :md command.

This MR includes the fix in the readDirentField function, which had some errors parsing the offsets of the DirEnt struct.

Moreover, it includes the following changes:

• Add types to fs.ts
• Some minimal refactoring.
• Deprecates darwin-32 support.
• Add dirent.c to list the hardcoded offsets per platform.