Fix threading issue in cmdlets

- Fixed threading issue in cmdlets that was causing 'WriteObject and WriteError methods cannot be called from outside the overrides' error
- Changed module structure to use DLL as root module instead of nested module
- Updated configuration cmdlets to properly handle async operations

output/PSOPNSenseAPI-01/PSOPNSenseAPI.psm1

@@ -0,0 +1,13 @@
+# Load the main assembly directly
+$mainDllPath = Join-Path $PSScriptRoot "lib\PSOPNSenseAPI.dll"
+
+Write-Verbose "Loading assembly from $mainDllPath"
+
+try {
+    Add-Type -Path $mainDllPath
+    Write-Verbose "Successfully loaded assembly from $mainDllPath"
+} catch {
+    $errorMessage = $_.Exception.Message
+    Write-Error "Failed to load assembly from $($mainDllPath): $($errorMessage)"
+    throw
+}