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/SwiftLintCore/Extensions/Configuration+Remote.swift

@@ -4,6 +4,10 @@ import Foundation // swiftlint:disable:this file_name
 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.
@@ -87,7 +91,11 @@ 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

Source/SwiftLintCore/Helpers/Reachability.swift

@@ -1,4 +1,4 @@
-#if !os(Linux)
+#if !os(Linux) && !os(Windows)
 import SystemConfiguration
 #endif
 
@@ -9,9 +9,9 @@ enum Reachability {
     }
 
     /// Returns whether the device is connected to a network, if known.
-    /// On Linux, this always evaluates to `nil`.
+    /// On Linux and Windows, this always evaluates to `nil`.
     static var connectivityStatus: ConnectivityStatus {
-#if os(Linux)
+#if os(Linux) || os(Windows)
         return .unknown
 #else
         var zeroAddress = sockaddr_in()