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

go-api-examples/offline-tts-play/run-vits-vctk.sh

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+
+set -ex
+
+if [ ! -d vits-vctk ]; then
+  curl -SL -O https://github.com/k2-fsa/sherpa-onnx/releases/download/tts-models/vits-vctk.tar.bz2
+  tar xvf vits-vctk.tar.bz2
+  rm vits-vctk.tar.bz2
+fi
+
+go mod tidy
+go build
+
+for sid in 0 10 108; do
+./offline-tts-play \
+  --vits-model=./vits-vctk/vits-vctk.onnx \
+  --vits-lexicon=./vits-vctk/lexicon.txt \
+  --vits-tokens=./vits-vctk/tokens.txt \
+  --sid=0 \
+  --debug=1 \
+  'Ask not what your country can do for you; ask what you can do for your country.'
+done