Refactor configuration data export and template loading functions

- Updated Export-ConfigurationData to use resolved configuration data directly and added error handling for missing data.
- Enhanced Load-Templates to streamline category loading and improve error handling for missing template directories.
- Removed Merge-ConfigurationData function as it is no longer needed.
- Refactored Merge-Templates to improve merging logic and handle default files more effectively.
- Introduced Get-TemplatePreviewData function to handle template preview data retrieval and merging.
- Added Import-OrderedPowerShellDataFile function to support ordered hashtable imports.
- Updated Update-ParametersPanel to handle parameter and variable tab updates more efficiently.
- Improved Update-TreeView to handle cases where resources are not found.
- Added new parameters to Environment.Default.psd1 for Active Directory configuration.
- Created new template BGW-LAN.psd1 for domain configuration.

Templates/Environment/BGW-LAN.psd1

@@ -0,0 +1,13 @@
+@{
+    Parameters = @{
+        DomainLabel = @{
+            Value = 'LAN'
+        }
+        DomainFQDN = @{
+            Value = 'bgw-online.de'
+        }
+        DomainNetBIOS = @{
+            Value = 'BGW-Online'
+        }
+    }
+}