feat: OpenXML.Word.Heading.get_Markdown ( Fixes PoshWeb#55 )

Author: StartAutomating

Types/OpenXML.Word.Heading/get_Markdown.ps1

@@ -0,0 +1,38 @@
+$runs = @($this.r)        
+$headingLevel = 1
+if ($this.pPr.pStyle -match '\d') {
+    $headingLevel = $matches.0 -as [int]
+}
+    
+('#' * ($headingLevel)) + 
+    ' ' + 
+    $(@(foreach ($run in $runs) {
+    
+        $runText = $run.t
+        if ($runText -isnot [string]) {
+            $runText = $run.t.InnerText
+        }
+
+        if (-not $run.rPr.psobject.properties) {
+            $runText
+        }
+        elseif ($run.rPr.psobject.properties['b'] -and
+            $run.rPr.psobject.properties['i']
+        ) {
+            "***$runText***"
+        }
+        elseif (                
+            $run.rPr.psobject.properties['b']
+        ) {
+            "**$runText**"
+        }
+        elseif (                
+            $run.rPr.psobject.properties['i']
+        ) {
+            "*$runText*"
+        } else  {
+            $runText  
+        } 
+        
+    }
+) -join '' -replace '(?<=\w)(?>\*{6}|\*{4})(?=\w)')