This MR uses the cursor-shapes-v1 protocol to tell the compositor which system cursor shape to use. If a shape match is not found (or cursor-shapes-v1 is not available) we fall back to setting the cursor buffer from the Windows cursor data as before.
The second commit implements support for a "UseSystemCursors" driver option, similar to what winex11 has. Since this is the first winewayland driver option we also introduce all the related registry reading code.
Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=57648
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Side note: The registry code is a copy from winex11, and is the third copy in the codebase (x11, mac, wayland). Perhaps it's worth introducing a common ntuser function to perform the option reading for the drivers, something like `NtUserGetDriverOption("X11 Driver", buffer, buffer_size, TRUE /* whether to read app specific option if present */)`. With such a function there is the concern about each call reopening the registry, but we can see if that's actually a problem and how a different API (or some sort of caching) may help.
-- v6: winewayland: Use system cursor shapes when possible.