feat: MarkX.LiquidPattern ( Fixes #46 )

Author: StartAutomating

Types/MarkX/get_LiquidPattern.ps1

@@ -0,0 +1,28 @@
+<#
+.SYNOPSIS
+    Get the Liquid Pattern
+.DESCRIPTION
+    Gets the regular expression pattern used to match Liquid tags.
+#>
+param()
+$liquidPattern = @(
+    '(?>'
+        '\{\%\s{0,}'
+        '(?<tag>[^\%]+)'
+        '\s{0,}\%}'
+        
+        '|'
+
+        '(?<noescape>\{{3})'
+        '(?<expression>[^\}]+)'
+        '\}{3}'
+
+        '|'
+
+        '\{{2}'
+        '(?<expression>[^\}]+)'
+        '\}{2}'
+    ')'    
+) -join ''
+
+return [Regex]::new($liquidPattern)