Add setting for removal of trailing whitespace via PSES/PSSA

Author: liamjpeters

package.json

@@ -898,6 +898,11 @@
             "type": "boolean",
             "default": false,
             "markdownDescription": "Use correct casing for cmdlets."
+          },
+          "powershell.codeFormatting.removeTrailingWhitespace": {
+            "type": "boolean",
+            "default": false,
+            "markdownDescription": "Removes trailing whitespace from the end of a line."
           }
         }
       },

src/settings.ts

@@ -94,6 +94,7 @@ class CodeFormattingSettings extends PartialSettings {
     alignPropertyValuePairs = true;
     useConstantStrings = false;
     useCorrectCasing = false;
+    removeTrailingWhitespace = false;
 }
 
 class ScriptAnalysisSettings extends PartialSettings {