Add support to show suggestions on CommandNotFound exception (#8458)

* support fuzzy matching with get-command and on CommandNotFound exception, show suggestion
* fix CodeFactor issues
* change algorithm to use Damerau-Levenshtein Distance which is more useful in finding close matches

test/powershell/Modules/Microsoft.PowerShell.Utility/Get-Command.Tests.ps1

@@ -0,0 +1,23 @@
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License.
+
+Describe "Get-Command CI tests" -Tag Feature {
+    Context "-UseFuzzyMatch tests" {
+        It "Should match cmdlets" {
+            $cmds = Get-Command get-hlp -UseFuzzyMatch
+            $cmds.Count | Should -BeGreaterThan 0
+            $cmds[0].Name | Should -BeExactly 'Get-Help' -Because "This should be closest match so shows up first"
+        }
+
+        It "Should match native commands" {
+            $ping = "ping"
+            if ($IsWindows) {
+                $ping = "PING.EXE"
+            }
+
+            $cmds = Get-Command pin -UseFuzzyMatch
+            $cmds.Count | Should -BeGreaterThan 0
+            $cmds.Name | Should -Contain $ping
+        }
+    }
+}