add powershell install script.

install_windows.ps1

@@ -0,0 +1,59 @@
+
+$RTT_PYTHON = "python"
+
+function Test-Command( [string] $CommandName ) {
+    (Get-Command $CommandName -ErrorAction SilentlyContinue) -ne $null
+}
+
+foreach ($p_cmd in ("python3","python")) {
+    cmd /c $p_cmd --version | Out-Null
+    if (!$?)  { continue }
+    $RTT_PYTHON = $p_cmd
+    break
+}
+
+if (!(Test-Command $RTT_PYTHON)) {
+    echo "Python not installed. Will install python 3.11.2."
+    echo "Downloading Python."
+    wget -O Python_setup.exe https://www.python.org/ftp/python/3.11.2/python-3.11.2.exe
+    echo "Installing Python."
+    if (Test-Path -Path "D:\") {
+        cmd /c Python_setup.exe /quiet TargetDir=D:\Progrem\Python311 InstallAllUsers=1 PrependPath=1 Include_test=0
+    }
+    else {
+        cmd /c Python_setup.exe /quiet InstallAllUsers=1 PrependPath=1 Include_test=0
+    }
+}
+
+if (!(Test-Command git)) {
+    echo "Git not installed. Will install Git."
+    echo "Installing git."
+    winget install --id Git.Git -e --source winget
+}
+
+cmd /c $RTT_PYTHON -m pip list | Out-Null
+if (!$?) {
+    echo "Installing pip."
+    cmd /c $RTT_PYTHON -m ensurepip --upgrade
+}
+
+cmd /c $RTT_PYTHON -m pip install --upgrade pip | Out-Null
+
+if (!(Test-Command scons)) {
+    echo "Installing scons."
+    cmd /c $RTT_PYTHON -m pip install scons
+}
+
+cmd /c $RTT_PYTHON -m pip list | findstr "requests"  | Out-Null
+if (!$?) {
+    echo "Installing requests."
+    cmd /c $RTT_PYTHON -m pip install requests
+}
+
+$url="https://raw.githubusercontent.com/RT-Thread/env/master/touch_env.ps1"
+if ($args[0] -eq "--gitee") {
+    $url="https://gitee.com/RT-Thread-Mirror/env/raw/master/touch_env.ps1"
+}
+
+wget $url -O touch_env.ps1
+./touch_env.ps1 $args[0]

touch_env.ps1

@@ -0,0 +1,25 @@
+$DEFAULT_RTT_PACKAGE_URL="https://github.com/RT-Thread/packages.git"
+# you can change the package url by defining RTT_PACKAGE_URL, ex:
+#    export RTT_PACKAGE_URL=https://github.com/Varanda-Labs/packages.git
+$RTT_URL="https://github.com/RT-Thread/rt-thread.git"
+$ENV_URL="https://github.com/RT-Thread/env.git"
+
+if ($args[0] -eq "--gitee") {
+    echo "Using gitee service."
+    $DEFAULT_RTT_PACKAGE_URL="https://gitee.com/RT-Thread-Mirror/packages.git"
+    $RTT_URL="https://gitee.com/rtthread/rt-thread.git"
+    $ENV_URL="https://gitee.com/RT-Thread-Mirror/env.git"
+}
+
+$env_dir = "$HOME\.env"
+if (!(Test-Path -Path $env_dir)) {
+    $package_url=$DEFAULT_RTT_PACKAGE_URL
+    mkdir $env_dir | Out-Null
+    mkdir $env_dir\local_pkgs | Out-Null
+    mkdir $env_dir\packages | Out-Null
+    mkdir $env_dir\tools | Out-Null
+    git clone $package_url $env_dir/packages/packages
+    echo 'source "$PKGS_DIR/packages/Kconfig"' > $env_dir/packages/Kconfig
+    git clone $ENV_URL $env_dir/tools/scripts
+    echo '$env:path="$HOME\.env\tools\scripts;$env:path"' > $env_dir/env.ps1
+}