Add C++ and Python API for Kokoro TTS models. (#1715)

.github/scripts/test-python.sh

@@ -267,6 +267,25 @@ log "Offline TTS test"
 # test waves are saved in ./tts
 mkdir ./tts
 
+log "kokoro-en-v0_19 test"
+
+curl -SL -O https://github.com/k2-fsa/sherpa-onnx/releases/download/tts-models/kokoro-en-v0_19.tar.bz2
+tar xf kokoro-en-v0_19.tar.bz2
+rm kokoro-en-v0_19.tar.bz2
+
+python3 ./python-api-examples/offline-tts.py \
+  --debug=1 \
+  --kokoro-model=./kokoro-en-v0_19/model.onnx \
+  --kokoro-voices=./kokoro-en-v0_19/voices.bin \
+  --kokoro-tokens=./kokoro-en-v0_19/tokens.txt \
+  --kokoro-data-dir=./kokoro-en-v0_19/espeak-ng-data \
+  --num-threads=2 \
+  --sid=10 \
+  --output-filename="./tts/kokoro-10.wav" \
+  "Today as always, men fall into two groups: slaves and free men. Whoever does not have two-thirds of his day for himself, is a slave, whatever he may be  a statesman, a businessman, an official, or a scholar."
+
+rm -rf kokoro-en-v0_19
+
 log "matcha-ljspeech-en test"
 
 curl -SL -O https://github.com/k2-fsa/sherpa-onnx/releases/download/tts-models/matcha-icefall-en_US-ljspeech.tar.bz2