add: Create public function for merge

source/Private/Update-CISExcelWorksheet.ps1

@@ -0,0 +1,33 @@
+function Update-CISExcelWorksheet {
+    [CmdletBinding()]
+    param (
+        [Parameter(Mandatory = $true)]
+        [string]$ExcelPath,
+
+        [Parameter(Mandatory = $true)]
+        [string]$WorksheetName,
+
+        [Parameter(Mandatory = $true)]
+        [psobject[]]$Data,
+
+        [Parameter(Mandatory = $false)]
+        [int]$StartingRowIndex = 2 # Default starting row index, assuming row 1 has headers
+    )
+
+    process {
+        # Load the existing Excel sheet
+        $excelPackage = Open-ExcelPackage -Path $ExcelPath
+        $worksheet = $excelPackage.Workbook.Worksheets[$WorksheetName]
+
+        if (-not $worksheet) {
+            throw "Worksheet '$WorksheetName' not found in '$ExcelPath'"
+        }
+
+
+        # Update the worksheet with the provided data
+        Update-WorksheetCells -Worksheet $worksheet -Data $Data -StartingRowIndex $StartingRowIndex
+
+        # Save and close the Excel package
+        Close-ExcelPackage $excelPackage
+    }
+}