Add Windows CUDA release artifacts (#8750)

Signed-off-by: jh-block <jhugo@block.xyz>

documentation/docs/getting-started/installation.md

@@ -141,6 +141,10 @@ import { PanelLeft } from 'lucide-react';
           1. Unzip the downloaded zip file.
           2. Run the executable file to launch the goose Desktop application.
 
+          :::info Windows variants
+          `Windows` is the standard general-purpose build. `Windows CUDA` is for NVIDIA GPUs with a compatible CUDA driver/runtime.
+          :::
+
           :::tip Updating goose
           It's best to periodically [update goose](/docs/guides/updating-goose).
           :::
@@ -152,19 +156,33 @@ import { PanelLeft } from 'lucide-react';
         - **MSYS2**: Available from [msys2.org](https://www.msys2.org/)
         - **PowerShell**: Available on Windows 10/11 by default
 
-        Run the installation command in your chosen environment:
+        Use the standard build for the general-purpose Windows install. Use the CUDA variant if you have an NVIDIA GPU with a compatible CUDA driver/runtime.
+
+        **Git Bash / MSYS2: Standard**
 
         ```bash
         curl -fsSL https://github.com/aaif-goose/goose/releases/download/stable/download_cli.sh | bash
         ```
 
+        **Git Bash / MSYS2: Windows CUDA**
+
+        ```bash
+        curl -fsSL https://github.com/aaif-goose/goose/releases/download/stable/download_cli.sh | GOOSE_WINDOWS_VARIANT=cuda bash
+        ```
+
         To install without interactive configuration, disable `CONFIGURE`:
 
         ```bash
         curl -fsSL https://github.com/aaif-goose/goose/releases/download/stable/download_cli.sh | CONFIGURE=false bash
         ```
 
-        **PowerShell Installation:**
+        To install the CUDA variant without interactive configuration:
+
+        ```bash
+        curl -fsSL https://github.com/aaif-goose/goose/releases/download/stable/download_cli.sh | GOOSE_WINDOWS_VARIANT=cuda CONFIGURE=false bash
+        ```
+
+        **PowerShell Installation: Standard**
         Download the PowerShell installation script to your current directory.
 
         ```powershell
@@ -175,6 +193,14 @@ import { PanelLeft } from 'lucide-react';
         .\download_cli.ps1
         ```
 
+        **PowerShell Installation: Windows CUDA**
+
+        ```powershell
+        Invoke-WebRequest -Uri "https://raw.githubusercontent.com/aaif-goose/goose/main/download_cli.ps1" -OutFile "download_cli.ps1";
+        $env:GOOSE_WINDOWS_VARIANT="cuda"
+        .\download_cli.ps1
+        ```
+
         :::info Windows PATH Setup
         If you see a warning that goose is not in your PATH, you need to add goose to your PATH: