feat: OpenXML.Excel.File.get_Cell ( Fixes #6 )

Handling text cells

Author: StartAutomating

Examples/Sample.pptx

@@ -1,9 +1,16 @@
 $excelCells = [Ordered]@{
 
 }
+$sharedStrings = $this.OpenXML.Parts['/xl/sharedStrings.xml'].Content
 foreach ($worksheetRow in $this.content.worksheet.sheetdata.row) {
     foreach ($worksheetColumn in $worksheetRow.c) {
-        $excelCells[$worksheetColumn.r] = $worksheetColumn.v
+        
+        $excelCells[$worksheetColumn.r] = 
+            if ($worksheetColumn.t -eq 's') {
+                $this.OpenXML.SharedStrings[$worksheetColumn.v -as [int]]
+            } else {
+                $worksheetColumn.v   
+            }
     }
 }
 $excelCells