✨ Import text-editor code into the repository

frontend/text-editor/editor/controllers/SelectionDirection.js

@@ -0,0 +1,16 @@
+/**
+ * Indicates the direction of the selection.
+ *
+ * @readonly
+ * @enum {number}
+ */
+export const SelectionDirection = {
+  /** The anchorNode is behind the focusNode  */
+  FORWARD: 1,
+  /** The focusNode and the anchorNode are collapsed */
+  NONE: 0,
+  /** The focusNode is behind the anchorNode */
+  BACKWARD: -1,
+};
+
+export default SelectionDirection;