Use the Windows APIs properly to compute the current working directory.
Query the required storage before performing the allocation and then use
temporary storage to acquire a buffer. This repairs some of the build
errors encountered when building on Windows.
When trying to revive the Windows port, these warnings clutter the
current set of things to resolve still. Silence the warnings by
explicitly ignoring the results.
This allows us to get further into building FoundationEssentials once
again on Windows. Much of the file system work has resulted in this
module no longer being viable on Windows and will need to be replaced to
allow building on Windows which does not have the `fts` APIs.
* (123438249) FileManager.removeItem does not throw error when encoutering long paths
The change makes swift-foundation FileManager.removeItem properly throw
on removefile(3) errors.
* Conform POSIXError to Error
* Clean up warnings and produce more detailed test failures
* Fix macOS CI failure
* (123102499) Swift implementation of setAttributes:forItemAtPath: is slower than the old ObjC implementation
* Move relevant key list to static array
* Fix build failure
