Add Go implementation of the TTS generation callback (#2213)

go-api-examples/offline-tts-play/run-kokoro-zh-en.sh

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+
+set -ex
+
+if [ ! -f ./kokoro-multi-lang-v1_0/model.onnx ]; then
+  curl -SL -O https://github.com/k2-fsa/sherpa-onnx/releases/download/tts-models/kokoro-multi-lang-v1_0.tar.bz2
+  tar xf kokoro-multi-lang-v1_0.tar.bz2
+  rm kokoro-multi-lang-v1_0.tar.bz2
+fi
+
+go mod tidy
+go build
+
+./offline-tts-play \
+  --kokoro-model=./kokoro-multi-lang-v1_0/model.onnx \
+  --kokoro-voices=./kokoro-multi-lang-v1_0/voices.bin \
+  --kokoro-tokens=./kokoro-multi-lang-v1_0/tokens.txt \
+  --kokoro-data-dir=./kokoro-multi-lang-v1_0/espeak-ng-data \
+  --kokoro-dict-dir=./kokoro-multi-lang-v1_0/dict \
+  --kokoro-lexicon=./kokoro-multi-lang-v1_0/lexicon-us-en.txt,./kokoro-multi-lang-v1_0/lexicon-zh.txt \
+  --debug=1 \
+  "中英文语音合成测试。This is generated by next generation Kaldi using Kokoro without Misaki. 你觉得中英文说的如何呢？"