remove unused code

fix: support older cpus in openblas

fix: coqui xtts license download error

fix: reading doesn't stop on tts error

enable new langs in whisper: az, be, ml, ta, kn

improve libwhisper build script

update readme for new features in v4.8.0

add option for setting window size

fix: build error

speed up canceling in parler-tts