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

docs/examples/DHCP-Management.ps1

@@ -0,0 +1,41 @@
+# 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 DHCP servers
+$dhcpServers = Get-OPNSenseDHCPServer
+$dhcpServers | Format-Table -Property Interface, Enabled, RangeFrom, RangeTo, Gateway
+
+# Get a specific DHCP server
+$lanDhcp = Get-OPNSenseDHCPServer -Interface "lan"
+$lanDhcp
+
+# Update a DHCP server
+Set-OPNSenseDHCPServer -Interface "lan" -RangeFrom "192.168.1.100" -RangeTo "192.168.1.200" -Domain "example.local" -DnsServers "8.8.8.8","8.8.4.4" -Apply
+
+# Get all DHCP leases
+$dhcpLeases = Get-OPNSenseDHCPLease
+$dhcpLeases | Format-Table -Property MacAddress, IpAddress, Hostname, State
+
+# Get active DHCP leases
+$activeLeases = $dhcpLeases | Where-Object { $_.State -eq "active" }
+$activeLeases | Format-Table -Property MacAddress, IpAddress, Hostname
+
+# Get all static mappings for an interface
+$staticMappings = Get-OPNSenseDHCPStaticMapping -Interface "lan"
+$staticMappings | Format-Table -Property Uuid, MacAddress, IpAddress, Hostname, Description
+
+# Create a new static mapping
+$newMapping = New-OPNSenseDHCPStaticMapping -Interface "lan" -MacAddress "00:11:22:33:44:55" -IpAddress "192.168.1.50" -Hostname "printer" -Description "Office Printer" -Apply
+$newMapping
+
+# Update a static mapping
+Set-OPNSenseDHCPStaticMapping -Interface "lan" -Uuid $newMapping -IpAddress "192.168.1.51" -Description "Updated Printer" -Apply
+
+# Remove a static mapping
+Remove-OPNSenseDHCPStaticMapping -Interface "lan" -Uuid $newMapping -Force -Apply
+
+# Disconnect from the firewall
+Disconnect-OPNSense