V2 beta and GM2022.8 compatibility

This update is a complete rewrite of the extension:

• Consistent with some of my other recent updates, the DLL is now pretty tiny (10KB total).
• The extension has a new API - instead of creating a cursor on spot (which could take a up to a few milliseconds depending on how big it is), you prepare cursors in advance and then pick which one you want to be displayed.
  A backwards-compatible API (native_cursor_v1_compat) that does things the old way is provided.
• The extension now supports animated cursors so that you don’t have to do that yourself.
• There is no HTML5 version of this rewrite since I have not been informed in advance of GM2022.8 releasing and deprecating the x86 runtime.