docs: add powershell commands

Author: giladgd

docs/guide/CUDA.md

@@ -89,10 +89,15 @@ export CUDACXX=/usr/local/cuda-12.4/bin/nvcc
 export CUDA_PATH=/usr/local/cuda-12.4
 ```
 
-```cmd [Windows]
+```cmd [Windows (cmd)]
 set CUDACXX=C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v12.4\bin\nvcc.exe
 set CUDA_PATH=C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v12.4
 ```
+
+```cmd [Windows (PowerShell)]
+$env:CUDACXX="C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v12.4\bin\nvcc.exe"
+$env:CUDA_PATH="C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v12.4"
+```
 :::
 
 Then run the build command again to check whether setting the `CUDACXX` and `CUDA_PATH` environment variables fixed the issue.
@@ -110,9 +115,13 @@ To do this, set the `NODE_LLAMA_CPP_CMAKE_OPTION_CMAKE_GENERATOR_TOOLSET` enviro
 export NODE_LLAMA_CPP_CMAKE_OPTION_CMAKE_GENERATOR_TOOLSET=$CUDA_PATH
 ```
 
-```cmd [Windows]
+```cmd [Windows (cmd)]
 set NODE_LLAMA_CPP_CMAKE_OPTION_CMAKE_GENERATOR_TOOLSET=%CUDA_PATH%
 ```
+
+```cmd [Windows (PowerShell)]
+$env:NODE_LLAMA_CPP_CMAKE_OPTION_CMAKE_GENERATOR_TOOLSET=$env:CUDA_PATH
+```
 :::
 
 Then run the build command again to check whether setting the `CMAKE_GENERATOR_TOOLSET` cmake option fixed the issue.