contexted link highlight + adjust prettier

src/ckeditor/ContextedPlugin.ts

@@ -1,9 +1,16 @@
 import Plugin from '@ckeditor/ckeditor5-core/src/plugin'
+import { TwoStepCaretMovement, inlineHighlight } from 'ckeditor5/src/typing'
+
+const HIGHLIGHT_CLASS = 'ck-link_selected'
 
 export default class ContextedLinkEditing extends Plugin {
   init() {
     this._defineSchema() // ADDED
     this._defineConverters() // ADDED
+    const twoStepCaretMovementPlugin = this.editor.plugins.get(TwoStepCaretMovement)
+    twoStepCaretMovementPlugin.registerAttribute('contextedLink')
+
+    inlineHighlight(this.editor, 'contextedLink', 'a', HIGHLIGHT_CLASS)
   }
   _defineSchema() {
     // ADDED