[REQUEST] Powershell script should be replaced by Bash script for Windows for easier development

[Willy030125]

Windows users can install Bash support like win64devkit that includes "make" for compiling llama and other binaries, so no need to use Powershell script anymore, the only downside is no libcuda (gpu) support for this. For now, let's just use cpu backend for Windows, except if users have an effort to install Visual C++ build support and CUDA compiler with Visual Studio integration xD