Replaced quote type to the Text Quote Selector matching shape

Author: oleksandr-danylchenko

packages/text-annotator/src/model/TextAnnotation.ts

@@ -14,7 +14,15 @@ export interface TextAnnotationTarget extends AnnotationTarget {
 
 export interface TextSelector {
 
-  quote: string;
+  /**
+   * Matches the `Text Quote Selector` spec from the W3C Annotation Data Model
+   * @see https://www.w3.org/TR/annotation-model/#text-quote-selector
+   */
+  quote: {
+    exact: string;
+    prefix: string;
+    suffix: string;
+  }
 
   start: number;
 
@@ -24,4 +32,4 @@ export interface TextSelector {
 
   offsetReference?: HTMLElement
 
-}
+}