Update configuration management cmdlets

- Added Get-OPNSenseConfig cmdlet that retrieves the OPNSense configuration as an XML document
- Updated Restore-OPNSenseConfig to accept an XML document from the pipeline or as a parameter
- Changed Export-OPNSenseConfig and Import-OPNSenseConfig to use System.IO.FileInfo for the Path parameter
- Removed Backup-OPNSenseConfig cmdlet (use Get-OPNSenseConfig instead)
- Updated documentation and examples

docs/cmdlets/Import-OPNSenseConfig.md

@@ -0,0 +1,106 @@
+# Import-OPNSenseConfig
+
+## SYNOPSIS
+Imports an OPNSense firewall configuration.
+
+## SYNTAX
+
+```
+Import-OPNSenseConfig -Path <FileInfo> [-Force] [-WhatIf] [-Confirm]
+```
+
+## DESCRIPTION
+The Import-OPNSenseConfig cmdlet imports an OPNSense firewall configuration from a file.
+
+## EXAMPLES
+
+### Example 1: Import a configuration from a file
+```powershell
+$path = New-Object System.IO.FileInfo "C:\Backups\opnsense-config.xml"
+Import-OPNSenseConfig -Path $path
+```
+
+This example imports an OPNSense firewall configuration from a file.
+
+## PARAMETERS
+
+### -Path
+The path to the configuration file. Must be a FileInfo object with an .xml extension.
+
+```yaml
+Type: FileInfo
+Parameter Sets: (All)
+Aliases:
+
+Required: True
+Position: 0
+Default value: None
+Accept pipeline input: False
+Accept wildcard characters: False
+```
+
+### -Force
+Suppresses the confirmation prompt.
+
+```yaml
+Type: SwitchParameter
+Parameter Sets: (All)
+Aliases:
+
+Required: False
+Position: Named
+Default value: None
+Accept pipeline input: False
+Accept wildcard characters: False
+```
+
+### -WhatIf
+Shows what would happen if the cmdlet runs. The cmdlet is not run.
+
+```yaml
+Type: SwitchParameter
+Parameter Sets: (All)
+Aliases: wi
+
+Required: False
+Position: Named
+Default value: None
+Accept pipeline input: False
+Accept wildcard characters: False
+```
+
+### -Confirm
+Prompts you for confirmation before running the cmdlet.
+
+```yaml
+Type: SwitchParameter
+Parameter Sets: (All)
+Aliases: cf
+
+Required: False
+Position: Named
+Default value: None
+Accept pipeline input: False
+Accept wildcard characters: False
+```
+
+### CommonParameters
+This cmdlet supports the common parameters: -Debug, -ErrorAction, -ErrorVariable, -InformationAction, -InformationVariable, -OutVariable, -OutBuffer, -PipelineVariable, -Verbose, -WarningAction, and -WarningVariable. For more information, see [about_CommonParameters](http://go.microsoft.com/fwlink/?LinkID=113216).
+
+## INPUTS
+
+### None
+
+## OUTPUTS
+
+### None
+
+## NOTES
+This cmdlet requires a connection to an OPNSense firewall. Use Connect-OPNSense to establish a connection.
+The firewall will restart after the configuration is imported.
+
+## RELATED LINKS
+
+[Get-OPNSenseConfig](Get-OPNSenseConfig.md)
+[Export-OPNSenseConfig](Export-OPNSenseConfig.md)
+[Restore-OPNSenseConfig](Restore-OPNSenseConfig.md)