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

docs/examples/Plugin-Management.ps1

@@ -0,0 +1,29 @@
+# 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 installed plugins
+$installedPlugins = Get-OPNSensePlugin -Installed
+$installedPlugins | Format-Table -Property Name, Version, Comment, Enabled
+
+# Get all available plugins
+$availablePlugins = Get-OPNSensePlugin -Available
+$availablePlugins | Format-Table -Property Name, Version, Comment
+
+# Install a plugin
+Install-OPNSensePlugin -Name "os-acme-client" -Wait
+Write-Output "Plugin installed successfully"
+
+# Enable a plugin
+Enable-OPNSensePlugin -Name "os-acme-client"
+
+# Disable a plugin
+Disable-OPNSensePlugin -Name "os-acme-client"
+
+# Uninstall a plugin
+Uninstall-OPNSensePlugin -Name "os-acme-client" -Wait -Confirm:$false
+
+# Disconnect from the firewall
+Disconnect-OPNSense