feat: Language.Filter(s) ( Fixes #1080 )

Types/Language/Alias.psd1

@@ -1,5 +1,6 @@
 @{
     Templates = 'Template'
     Functions = 'Function'
+    Filters = 'Filter'
     Aliases = 'Alias'
 }

Types/Language/get_Filter.ps1

@@ -0,0 +1,31 @@
+<#
+.SYNOPSIS
+    Gets Language Filters
+.DESCRIPTION
+    Gets Filters related to a language.
+    
+    Filters are a special type of function that are used to filter or transform data.    
+
+    These are filters that either match a language's `.FilePattern` or start with a language name, followed by punctuation.
+#>
+if (-not $global:AllFunctionsAndAliases) {
+    $global:AllFunctionsAndAliases = $global:ExecutionContext.SessionState.InvokeCommand.GetCommand('*','Function',$true)
+}
+$FunctionsForThisLanguage = [Ordered]@{PSTypeName='Language.Functions'}
+if ($this.FilePattern) {    
+    foreach ($FunctionForLanguage in $global:AllFunctionsAndAliases -match $this.FilePattern) {
+        if (-not $FunctionsForThisLanguage.IsFilter) {continue }
+        $FunctionsForThisLanguage["$FunctionForLanguage"] = $FunctionForLanguage
+    }    
+}
+if ($this.LanguageName) {
+    foreach ($FunctionForLanguage in $global:AllFunctionsAndAliases -match "(?<=(?>^|[\p{P}-[\\]]))$([Regex]::Escape($this.LanguageName))[\p{P}-[\\]]") {
+        if (-not $FunctionsForThisLanguage.IsFilter) {continue }
+        $FunctionsForThisLanguage["$FunctionForLanguage"] = $FunctionForLanguage
+    }
+}
+
+$FunctionsForThisLanguage = [PSCustomObject]$FunctionsForThisLanguage
+$FunctionsForThisLanguage.pstypenames.insert(0,"$($this.LanguageName).Functions")
+$FunctionsForThisLanguage
+