Allow the addition of custom PowerShell profiles

scripts/Windows/Scripts/Context.ps1

@@ -34,6 +34,22 @@ class Context {
         Get-PinnedItem -Type TaskBar | Where-Object { $_.Name -like "$pattern" } | Remove-PinnedItem;
     }
 
+    [void] AddPowerShellProfileStatement([string] $statement) {
+        $this.AddPowerShellProfileStatement($null, $statement);
+    }
+
+    [void] AddPowerShellProfileStatement([string] $category, [string] $statement) {
+        Push-Location ~;
+        $profileFiles = @((powershell -c '$PROFILE'), (pwsh -c '$PROFILE')) | ForEach-Object { Resolve-Path -Relative $_ };
+
+        if ($category) {
+            $profileFiles = $profileFiles | ForEach-Object { Join-Path (Split-Path -Parent $_) "profile.d" "$category.ps1"; };
+        }
+
+        $profileFiles | ForEach-Object { Add-Content "C:\Users\Default\$_" "`n$statement"; };
+        Pop-Location;
+    }
+
     [Microsoft.Win32.RegistryKey] EnsureConfigKey() {
         if (-not (Test-Path $this.ConfigRoot)) {
             $null = New-Item $this.ConfigRoot;