Add C API for Kokoro TTS models (#1717)

.github/workflows/cxx-api.yaml

@@ -81,6 +81,33 @@ jobs:
             otool -L ./install/lib/libsherpa-onnx-cxx-api.dylib
           fi
 
+      - name: Test Kokoro TTS (en)
+        shell: bash
+        run: |
+          g++ -std=c++17 -o kokoro-tts-en-cxx-api ./cxx-api-examples/kokoro-tts-en-cxx-api.cc \
+            -I ./build/install/include \
+            -L ./build/install/lib/ \
+            -l sherpa-onnx-cxx-api \
+            -l sherpa-onnx-c-api \
+            -l onnxruntime
+
+          curl -SL -O https://github.com/k2-fsa/sherpa-onnx/releases/download/tts-models/kokoro-en-v0_19.tar.bz2
+          tar xf kokoro-en-v0_19.tar.bz2
+          rm kokoro-en-v0_19.tar.bz2
+
+          export LD_LIBRARY_PATH=$PWD/build/install/lib:$LD_LIBRARY_PATH
+          export DYLD_LIBRARY_PATH=$PWD/build/install/lib:$DYLD_LIBRARY_PATH
+
+          ./kokoro-tts-en-cxx-api
+
+          rm kokoro-tts-en-cxx-api
+          rm -rf kokoro-en-*
+
+      - uses: actions/upload-artifact@v4
+        with:
+          name: kokoro-tts-${{ matrix.os }}
+          path: ./generated-kokoro-*.wav
+
       - name: Test Matcha TTS (zh)
         shell: bash
         run: |