Add C++ folder for supporting ONNX & LibTorch

examples/c++/README.md

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+# Silero-VAD V5 in C++ (based on LibTorch)
+
+This is the source code for Silero-VAD V6 in C++, utilizing LibTorch & Onnxruntime. 
+You should compare its results with the Python version. 
+Results at 16 and 8kHz have been tested. Batch and CUDA inference options are deprecated. 
+
+
+## Requirements
+- GCC 11.4.0 (GCC >= 5.1)
+- Onnxruntime 1.11.0 (other versions are also acceptable)
+- LibTorch 1.13.0 (other versions are also acceptable)
+
+## Download LibTorch
+
+```bash
+-Onnxruntime
+$wget https://github.com/microsoft/onnxruntime/releases/download/v1.11.1/onnxruntime-linux-x64-1.11.1.tgz
+$tar -xvf onnxruntime-linux-x64-1.11.1.tgz
+$ln -s onnxruntime-linux-x64-1.11.1 onnxruntime-linux    #soft-link
+
+-Libtorch
+$wget https://download.pytorch.org/libtorch/cpu/libtorch-shared-with-deps-1.13.0%2Bcpu.zip
+$unzip libtorch-shared-with-deps-1.13.0+cpu.zip
+```
+
+## Compilation
+
+```bash
+-ONNX-build
+$g++ main.cc silero.cc -I ./onnxruntime-linux/include/ -L ./onnxruntime-linux/lib/ -lonnxruntime -Wl,-rpath,./onnxruntime-linux/lib/ -o silero -std=c++14 -D_GLIBCXX_USE_CXX11_ABI=0 -DUSE_ONNX
+
+-TORCH-build
+$g++ main.cc silero.cc -I ./libtorch/include/ -I ./libtorch/include/torch/csrc/api/include -L ./libtorch/lib/ -ltorch -ltorch_cpu -lc10 -Wl,-rpath,./libtorch/lib/ -o silero -std=c++14 -D_GLIBCXX_USE_CXX11_ABI=0 -DUSE_TORCH
+```
+
+## Optional Compilation Flags
+-DUSE_TORCH
+-DUSE_ONNX
+
+## Run the Program
+To run the program, use the following command:
+
+`./silero <sample.wav> <SampleRate> <threshold>`
+`./silero aepyx.wav 16000 0.5`
+`./silero aepyx_8k.wav 8000 0.5`
+
+The sample file aepyx.wav is part of the Voxconverse dataset.
+File details: aepyx.wav is a 16kHz, 16-bit audio file.
+File details: aepyx_8k.wav is a 8kHz, 16-bit audio file.