Add lintGutter

Author: alex-ju

packages/components/src/modifiers/hds-code-editor.ts

@@ -8,7 +8,7 @@ import { assert, warn } from '@ember/debug';
 import { registerDestructor } from '@ember/destroyable';
 import { task } from 'ember-concurrency';
 import config from 'ember-get-config';
-import { linter } from '@codemirror/lint';
+import { linter, lintGutter } from '@codemirror/lint';
 
 // hds-dark theme
 import hdsDarkTheme from './hds-code-editor/themes/hds-dark-theme.ts';
@@ -321,6 +321,7 @@ export default class HdsCodeEditorModifier extends Modifier<HdsCodeEditorSignatu
         // hds dark theme
         hdsDarkTheme,
         syntaxHighlighting(hdsDarkHighlightStyle),
+        lintGutter(),
       ];
 
       if (languageExtension !== undefined) {