Add Flutter GUI example for VAD with a microphone. (#905)

sherpa-onnx/flutter/windows/CMakeLists.txt

@@ -0,0 +1,32 @@
+# The Flutter tooling requires that developers have a version of Visual Studio
+# installed that includes CMake 3.14 or later. You should not increase this
+# version, as doing so will cause the plugin to fail to compile for some
+# customers of the plugin.
+cmake_minimum_required(VERSION 3.14)
+
+# Project-level configuration.
+set(PROJECT_NAME "sherpa_onnx")
+project(${PROJECT_NAME} LANGUAGES CXX)
+
+# Invoke the build for native code shared with the other target platforms.
+# This can be changed to accommodate different builds.
+# add_subdirectory("${CMAKE_CURRENT_SOURCE_DIR}/../src" "${CMAKE_CURRENT_BINARY_DIR}/shared")
+
+# List of absolute paths to libraries that should be bundled with the plugin.
+# This list could contain prebuilt libraries, or libraries created by an
+# external build triggered from this build file.
+set(sherpa_onnx_bundled_libraries
+  "${CMAKE_CURRENT_SOURCE_DIR}/sherpa-onnx-c-api.dll"
+  "${CMAKE_CURRENT_SOURCE_DIR}/sherpa-onnx-core.dll"
+  "${CMAKE_CURRENT_SOURCE_DIR}/kaldi-decoder-core.dll"
+  "${CMAKE_CURRENT_SOURCE_DIR}/sherpa-onnx-kaldifst-core.lib"
+  "${CMAKE_CURRENT_SOURCE_DIR}/sherpa-onnx-fstfar.lib"
+  "${CMAKE_CURRENT_SOURCE_DIR}/sherpa-onnx-fst.lib"
+  "${CMAKE_CURRENT_SOURCE_DIR}/kaldi-native-fbank-core.dll"
+  "${CMAKE_CURRENT_SOURCE_DIR}/piper_phonemize.dll"
+  "${CMAKE_CURRENT_SOURCE_DIR}/espeak-ng.dll"
+  "${CMAKE_CURRENT_SOURCE_DIR}/ucd.dll"
+  "${CMAKE_CURRENT_SOURCE_DIR}/onnxruntime.dll"
+  "${CMAKE_CURRENT_SOURCE_DIR}/ssentencepiece_core.dll"
+  PARENT_SCOPE
+)