Add DRI3 and Present support to Compiz/Port Compiz to DRI3 and Present

[berylline]

I'm not sure how this can be done yet, AFAIK.

Some things here for reference:

For both DRI3 and Present:

https://lwn.net/Articles/569701/

https://gitlab.freedesktop.org/wlroots/wlroots/-/blob/master/backend/x11/backend.c

https://gitlab.freedesktop.org/wlroots/wlroots/-/blob/master/backend/x11/output.c

For DRI3 alone:

https://keithp.com/blogs/dri3_extension/

https://xcb.freedesktop.org/manual/dri3_8h_source.html

https://gitlab.freedesktop.org/xorg/proto/xorgproto/-/blob/master/dri3proto.txt

https://github.com/rwiggins/xorgproto/blob/explicit-sync/dri3proto.txt

For Present alone:

https://keithp.com/blogs/Present/

https://xcb.freedesktop.org/manual/present_8h_source.html

https://gitlab.freedesktop.org/xorg/proto/xorgproto/-/blob/master/presentproto.txt

https://github.com/rwiggins/xorgproto/blob/explicit-sync/presentproto.txt

https://gitlab.freedesktop.org/xorg/lib/libxpresent/-/blob/master/include/X11/extensions/Xpresent.h

https://manpages.ubuntu.com/manpages/focal/man3/Xpresent.3.html