Refactor doctor.py into a directory (#13298)

lib/python/qmk/cli/doctor/windows.py

@@ -0,0 +1,14 @@
+import platform
+
+from milc import cli
+
+from .check import CheckStatus
+
+
+def os_test_windows():
+    """Run the Windows specific tests.
+    """
+    win32_ver = platform.win32_ver()
+    cli.log.info("Detected {fg_cyan}Windows %s (%s){fg_reset}.", win32_ver[0], win32_ver[1])
+
+    return CheckStatus.OK