Add headless macOS CLI workflow

CloudAPIPowerShellManagement.psm1

@@ -1,6 +1,21 @@
 #region Console functions
 
+function Test-IsWindowsPlatform
+{
+    return ([Environment]::OSVersion.Platform -eq [System.PlatformID]::Win32NT)
+}
+
+function Invoke-AppDoEvents
+{
+    if("System.Windows.Forms.Application" -as [type])
+    {
+        [System.Windows.Forms.Application]::DoEvents()
+    }
+}
+
 # https://stackoverflow.com/questions/40617800/opening-powershell-script-and-hide-command-prompt-but-not-the-gui
+if(Test-IsWindowsPlatform)
+{
 Add-Type -Name Window -Namespace Console -MemberDefinition '
 [DllImport("Kernel32.dll")]
 public static extern IntPtr GetConsoleWindow();
@@ -17,9 +32,11 @@ public static extern bool SetConsoleIcon(IntPtr hIcon);
 [DllImport("user32.dll")] 
 public static extern int SendMessage(int hWnd, uint wMsg, uint wParam, IntPtr lParam); 
 '
+}
 
 function Show-Console
 {
+    if(-not (Test-IsWindowsPlatform)) { return }
     $consolePtr = [Console.Window]::GetConsoleWindow()
 
     # Hide = 0,
@@ -41,6 +58,7 @@ function Show-Console
 
 function Hide-Console
 {
+    if(-not (Test-IsWindowsPlatform)) { return }
     $consolePtr = [Console.Window]::GetConsoleWindow()
     #0 hide
     [Console.Window]::ShowWindow($consolePtr, 0) | Out-Null
@@ -94,17 +112,19 @@ function Initialize-CloudAPIManagement
     )
 
     $PSModuleAutoloadingPreference = "none"
+    $global:hideUI = ($Silent -eq $true)
+    $global:SilentBatchFile = $SilentBatchFile
 
     $global:wpfNS = "xmlns='http://schemas.microsoft.com/winfx/2006/xaml/presentation' xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'"
 
-    [void] [System.Reflection.Assembly]::LoadWithPartialName("System.Windows.Forms") 
-    Add-Type -AssemblyName PresentationFramework
+    if($global:hideUI -ne $true)
+    {
+        [void] [System.Reflection.Assembly]::LoadWithPartialName("System.Windows.Forms") 
+        Add-Type -AssemblyName PresentationFramework
+    }
 
     [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
 
-    $global:hideUI = ($Silent -eq $true)
-    $global:SilentBatchFile = $SilentBatchFile
-
     if($tenantId)
     {
         Write-Host "Using Tenant Id: $tenantId"
@@ -163,7 +183,7 @@ function Initialize-CloudAPIManagement
             $global:txtSplashTitle.Text = ("Initializing Cloud API PowerShell Management")
 
             $global:SplashScreen.Show() | Out-Null
-            [System.Windows.Forms.Application]::DoEvents()
+            Invoke-AppDoEvents
         }
         catch 
         {
@@ -204,15 +224,15 @@ function Initialize-CloudAPIManagement
     {
         $global:txtSplashText.Text = "Unblock files"
     } 
-    [System.Windows.Forms.Application]::DoEvents()
+    Invoke-AppDoEvents
     Unblock-AllFiles $PSScriptRoot
 
     if($global:hideUI -ne $true)
     {
         $global:txtSplashText.Text = "Load core module"
     }
-    [System.Windows.Forms.Application]::DoEvents()
-    Import-Module ($PSScriptRoot + "\Core.psm1") -Force -Global
+    Invoke-AppDoEvents
+    Import-Module (Join-Path $PSScriptRoot "Core.psm1") -Force -Global
 
     Start-CoreApp $View
 }