add: Create public function for merge

source/Private/Merge-CISExcelAndCsvData.ps1

@@ -0,0 +1,47 @@
+function Merge-CISExcelAndCsvData {
+    [CmdletBinding()]
+    param (
+        [Parameter(Mandatory = $true)]
+        [string]$ExcelPath,
+
+        [Parameter(Mandatory = $true)]
+        [string]$WorksheetName,
+
+        [Parameter(Mandatory = $true)]
+        [string]$CsvPath
+    )
+
+    process {
+        # Import data from Excel and CSV
+        $import = Import-Excel -Path $ExcelPath -WorksheetName $WorksheetName
+        $csvData = Import-Csv -Path $CsvPath
+
+        # Define a function to create a merged object
+        function CreateMergedObject($excelItem, $csvRow) {
+            $newObject = New-Object PSObject
+
+            foreach ($property in $excelItem.PSObject.Properties) {
+                $newObject | Add-Member -MemberType NoteProperty -Name $property.Name -Value $property.Value
+            }
+
+            $newObject | Add-Member -MemberType NoteProperty -Name 'CSV_Status' -Value $csvRow.Status
+            $newObject | Add-Member -MemberType NoteProperty -Name 'CSV_Details' -Value $csvRow.Details
+            $newObject | Add-Member -MemberType NoteProperty -Name 'CSV_FailureReason' -Value $csvRow.FailureReason
+
+            return $newObject
+        }
+
+        # Iterate over each item in the imported Excel object and merge with CSV data
+        $mergedData = foreach ($item in $import) {
+            $csvRow = $csvData | Where-Object { $_.Rec -eq $item.'recommendation #' }
+            if ($csvRow) {
+                CreateMergedObject -excelItem $item -csvRow $csvRow
+            } else {
+                CreateMergedObject -excelItem $item -csvRow ([PSCustomObject]@{Status=$null; Details=$null; FailureReason=$null})
+            }
+        }
+
+        # Return the merged data
+        return $mergedData
+    }
+}