Add more useful PSSA rules that should be enabled by default (#669)

* add more useful PSSA rules that should be enabled by default since the majority of people cannot or do not know how to customize them (yet)

* add missing comma

* As per PR discussion, PSPossibleIncorrectComparisonWithNull and PSAvoidDefaultValueForMandatoryParameter should be part of it. Therefore removing the others.
But also adding the new PSAvoidTrailingWhitespace and PossibleIncorrectUsageOfRedirectionOperator rule

* fix rule typo, thanks @rkeithhill

Author: bergmeister

src/PowerShellEditorServices/Analysis/AnalysisService.cs

@@ -53,7 +53,11 @@ public class AnalysisService : IDisposable
             "PSShouldProcess",
             "PSMissingModuleManifestField",
             "PSAvoidDefaultValueSwitchParameter",
-            "PSUseDeclaredVarsMoreThanAssignments"
+            "PSUseDeclaredVarsMoreThanAssignments",
+            "PSPossibleIncorrectComparisonWithNull",
+            "PSAvoidDefaultValueForMandatoryParameter",
+            "PSAvoidTrailingWhitespace",
+            "PSPossibleIncorrectUsageOfRedirectionOperator"
         };
 
         #endregion // Private Fields