added a build script for windows and documentation for it

build/build_windows.ps1

@@ -0,0 +1,36 @@
+if ($args -contains "-it") {
+	if (-not (Get-Command git -ErrorAction SilentlyContinue)) {
+		winget install --id Git.Git -e
+	}
+	if (-not (Get-Command python -ErrorAction SilentlyContinue)) {
+		winget install --id Python.Python -e
+	}
+	if (-not (Get-Command cl -ErrorAction SilentlyContinue)) {
+		winget install --id Microsoft.VisualStudio.2022.BuildTools -e
+	}
+}
+
+if ($args -contains "-ci") {
+	Set-Location ..
+} else {
+	if (-not (Get-Command git -ErrorAction SilentlyContinue)) {
+		winget install --id Git.Git -e
+	}
+	git clone --head 1 https://github.com/samtupy/nvgt
+	Set-Location -Path "nvgt"
+}
+
+$windevPath = "windev"
+if (-not (Test-Path $windevPath) -or (Get-ChildItem $windevPath -Recurse | Measure-Object).Count -eq 0) {
+	$windevZipUrl = "https://nvgt.gg/windev.zip"
+	$zipFile = "$env:TEMP\windev.zip"
+	Invoke-WebRequest -Uri $windevZipUrl -OutFile $zipFile
+	New-Item -ItemType Directory -Path $windevPath -Force
+	Expand-Archive -Path $zipFile -DestinationPath $windevPath -Force
+}
+
+python -m venv venv --upgrade-deps
+.\venv\scripts\activate.ps1
+python -m pip install scons
+scons -s
+.\venv\scripts\deactivate.ps1

doc/src/advanced/Building NVGT For windows.md

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+# building nvgt on windows
+
+## Building with the `build_windows.ps1` script
+There is a [script for building NVGT for Windows](https://github.com/samtupy/nvgt/blob/main/build/build_windows.ps1). It requires [Winget](https://learn.microsoft.com/en-us/windows/package-manager/winget/) to be installed.
+
+This script allows for multiple parameters to alter it's behaviour:
+* `-it`: This parameter instructs the script to download the relevant tooling that will be used; this includes a compiler, Python, and Git.
+* `-ci`: This parameter tells the script that you have already cloned NVGT's repo and will download dependencies assuming it is in NVGT's top-level directory.
+
+### Notes
+PowerShell might refuse to execute the script do to execution policys. In this case, run the command:
+`Set-ExecutionPolicy -ExecutionPolicy Unrestricted -Scope Process`
+This will apply this change for the current session of PowerShell only
+
+For a more permanent solution, run one of the following:
+* `Set-ExecutionPolicy -ExecutionPolicy Unrestricted -Scope CurrentUser`: This will set this property for the current user only.
+* `Set-ExecutionPolicy -ExecutionPolicy Unrestricted -Scope LocalMachine`: This will set the policy for the intire system.
+
+Note: Setting this setting permanently requires running PowerShell as administrator.
+
+## Building NVGT manually
+if you do not wish to use this script for building nvgt, you can build NVGT manually. See the [main project readme](https://github.com/samtupy/nvgt/blob/main/readme.md) for more details.