Build sherpa-onnx as a single shared library (#1078)

When `-D BUILD_SHARED_LIBS=ON` is passed to `cmake`, it builds a single shared library.

Specifically, 

- For C APIs, it builds `libsherpa-onnx-c-api.so`
- For Python APIs, it builds `_sherpa_onnx.cpython-xx-xx.so`
- For Kotlin and Java APIs, it builds `libsherpa-onnx-jni.so`

There is no `libsherpa-onnx-core.so` any longer.

Note it affects only shared libraries.

scripts/node-addon-api/CMakeLists.txt

@@ -67,15 +67,6 @@ target_link_libraries(${PROJECT_NAME} ${CMAKE_JS_LIB})
 
 target_link_libraries(${PROJECT_NAME}
   sherpa-onnx-c-api
-  sherpa-onnx-core
-  kaldi-decoder-core
-  sherpa-onnx-kaldifst-core
-  sherpa-onnx-fstfar
-  sherpa-onnx-fst
-  kaldi-native-fbank-core
-  piper_phonemize
-  espeak-ng
-  ucd
   onnxruntime
   -Wl,-rpath,$ENV{SHERPA_ONNX_INSTALL_DIR}/lib
 )