SwiftLintCore: initial pass for Windows support

Add some Windows specific handling for the paths in SwiftLintCore.  The
one piece that this change does not cover is the handling of `glob` as
that is not an ISO C standard function and as such there is no `glob` on
Windows.  This will be worked through separately.

Author: compnerd

Source/SwiftLintFramework/Configuration/Configuration+Remote.swift

@@ -5,6 +5,10 @@ import SourceKittenFramework
 import FoundationNetworking
 #endif
 
+#if os(Windows)
+import func WinSDK.Sleep
+#endif
+
 internal extension Configuration.FileGraph.FilePath {
     // MARK: - Properties: Remote Cache
     /// This should never be touched.
@@ -83,7 +87,11 @@ internal extension Configuration.FileGraph.FilePath {
             while true {
                 if taskDone { break }
                 if Date().timeIntervalSince(startDate) > timeout { task.cancel(); break }
+#if os(Windows)
+                Sleep(50)
+#else
                 usleep(50_000) // Sleep for 50 ms
+#endif
             }
 
             // Handle wrong data