Add port forwarding support, improve XML documentation, and add unit tests

docs/examples/User-Management.ps1

@@ -0,0 +1,28 @@
+# Import the module
+Import-Module PSOPNSenseAPI
+
+# Connect to the OPNSense firewall
+Connect-OPNSense -Server "https://firewall.example.com" -ApiKey "your_api_key" -ApiSecret "your_api_secret" -SkipCertificateCheck
+
+# Get all users
+$users = Get-OPNSenseUser
+$users | Format-Table -Property Uuid, Username, FullName, Email, Disabled
+
+# Create a new user
+$userId = New-OPNSenseUser -Username "john" -Password "P@ssw0rd" -FullName "John Doe" -Email "john@example.com" -Groups "admins"
+Write-Output "Created user with ID: $userId"
+
+# Update a user
+Set-OPNSenseUser -Uuid $userId -Email "john.doe@example.com" -FullName "John A. Doe"
+
+# Disable a user
+Set-OPNSenseUser -Uuid $userId -Disabled
+
+# Enable a user
+Set-OPNSenseUser -Uuid $userId -Enabled
+
+# Remove a user
+Remove-OPNSenseUser -Uuid $userId -Confirm:$false
+
+# Disconnect from the firewall
+Disconnect-OPNSense