WIP: Add c++ runtime for Matcha-TTS

[csukuangfj]

CC @qt06

Usage

./build/bin/sherpa-onnx-offline-tts \
  --matcha-acoustic-model=./matcha/model-steps-3.onnx \
  --matcha-vocoder=./matcha/hifigan_v3.onnx \
  --matcha-lexicon=./matcha/lexicon.txt \
  --matcha-tokens=./matcha/tokens.txt \
  --matcha-dict-dir=./matcha/dict \
  --debug=1 \
  '小米的使命是，始终坚持做"感动人心、价格厚道"的好产品，让全球每个人都能享受科技带来的美好生活。'

You can download the dict directory from
https://github.com/csukuangfj/cppjieba/releases/download/sherpa-onnx-2024-04-19/dict.tar.bz2