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.

.github/workflows/test-build-wheel.yaml

@@ -110,10 +110,20 @@ jobs:
           python3 setup.py bdist_wheel
           ls -lh dist
 
+      - uses: actions/upload-artifact@v4
+        with:
+          name: wheel-${{ matrix.os }}-${{ matrix.python-version }}
+          path: ./dist/*.whl
+
       - name: Display wheel
         shell: bash
         run: |
           ls -lh dist
+          cd dist
+
+          mkdir t
+          cd t
+          unzip ../*.whl
 
       - name: Install wheel
         shell: bash