Rename aiplayer.ch as daiplayer.ch
To make distinction more clear between texaiplayer.c, taiplayer.c, and default aiplayer.c, last one should be renamed as daiplayer.c
New version of the patch fixes meson based build
To make distinction more clear between texaiplayer.c, taiplayer.c, and default aiplayer.c, last one should be renamed as daiplayer.c