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/run.sh

@@ -2,11 +2,16 @@
 
 set -ex
 
-if [[ ! -f ../../build/install/lib/libsherpa-onnx-core.dylib && ! -f ../../build/install/lib/libsherpa-onnx-core.so ]]; then
+if [[ ! -f ../../build/install/lib/libsherpa-onnx-c-api.dylib && ! -f ../../build/install/lib/libsherpa-c-api.so ]]; then
   pushd ../../
   mkdir -p build
   cd build
-  cmake -DCMAKE_INSTALL_PREFIX=./install -DBUILD_SHARED_LIBS=ON ..
+
+  cmake \
+    -DCMAKE_INSTALL_PREFIX=./install \
+    -DBUILD_SHARED_LIBS=ON \
+    ..
+
   make install
   popd
 fi