Add Swift API for TTS (#439)

.github/scripts/test-swift.sh

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+
+set -ex
+
+echo "pwd: $PWD"
+
+cd swift-api-examples
+ls -lh
+
+mkdir -p /Users/fangjun/Desktop
+pushd /Users/fangjun/Desktop
+wget -q https://huggingface.co/csukuangfj/test-data/resolve/main/Obama.wav
+ls -lh
+popd
+
+./run-generate-subtitles.sh
+
+ls -lh /Users/fangjun/Desktop
+cat /Users/fangjun/Desktop/Obama.srt
+
+./run-tts.sh
+ls -lh
+
+./run-decode-file.sh
+
+./run-decode-file-non-streaming.sh
+
+ls -lh