Add a function for retrieving nix options

scripts/Windows/Scripts/Config.ps1

@@ -13,6 +13,28 @@ $null = New-Module {
     [string] $finishedOption = "Finished";
     [RegistryKey] $key = $null;
 
+    <#
+        .SYNOPSIS
+        Converts the specified path to linux and escapes it for the use in a script.
+
+        .PARAMETER Path
+        The path to convert.
+    #>
+    function ConvertTo-LinuxPath {
+        param(
+            [string] $Path
+        )
+
+        $job = Start-Job {
+            $env:Value = Resolve-Path $Using:Path;
+            $env:WSLENV = "Value/p";
+            $result = wsl -- bash -c 'echo "$Value"';
+            wsl -e printf "%q" "$result";
+        };
+
+        Receive-Job -Wait $job;
+    }
+
     <#
         .SYNOPSIS
         Gets the registry key containing options related to the setup.
@@ -38,6 +60,27 @@ $null = New-Module {
         return $key;
     }
 
+    <#
+        .SYNOPSIS
+        Gets a configuration option.
+
+        .PARAMETER Name
+        The name of the option to get.
+    #>
+    function Get-Config {
+        param(
+            [string] $Name
+        )
+
+        $scriptPath = "$PSScriptRoot/../../Common/Scripts/config.fish";
+
+        function fish {
+            wsl -- nix --extra-experimental-features "nix-command flakes" nixpkgs`#fish $args
+        }
+
+        fish -c ". $(ConvertTo-LinuxPath $scriptPath); getConfig $Name --json" | ConvertFrom-Json;
+    }
+
     <#
         .SYNOPSIS
         Gets the value of an option related to the setup.