Add C API for streaming HLG decoding (#734)

.github/scripts/test-swift.sh

@@ -7,6 +7,10 @@ echo "pwd: $PWD"
 cd swift-api-examples
 ls -lh
 
+./run-streaming-hlg-decode-file.sh
+rm ./streaming-hlg-decode-file
+rm -rf sherpa-onnx-streaming-zipformer-ctc-small-2024-03-18
+
 ./run-spoken-language-identification.sh
 rm -rf sherpa-onnx-whisper*
 
@@ -31,4 +35,5 @@ sed -i.bak  '20d' ./decode-file.swift
 
 ./run-decode-file-non-streaming.sh
 
+
 ls -lh