Add specific configuration for windows in hie.yaml

hie.yaml

 # This is a IDE configuration file which tells IDEs such as `ghcide` how
 # to set up a GHC API session for this project.
 #
+# To use it in windows systems replace the config with
+# cradle: {bios: {program: "./hadrian/hie-bios.bat"}}
+#
 # The format is documented here - https://github.com/mpickering/hie-bios
 cradle: {bios: {program: "./hadrian/hie-bios"}}