docs: Add full Swagger JSDoc coverage

server/api/controllers/notifications/read-all.js

@@ -3,6 +3,34 @@
  * Licensed under the Fair Use License: https://github.com/plankanban/planka/blob/master/LICENSE.md
  */
 
+/**
+ * @swagger
+ * /api/notifications/read-all:
+ *   post:
+ *     summary: Mark all notifications as read
+ *     description: Marks all notifications for the current user as read.
+ *     tags:
+ *       - Notifications
+ *     responses:
+ *       200:
+ *         description: Notifications marked as read successfully
+ *         content:
+ *           application/json:
+ *             schema:
+ *               type: object
+ *               required:
+ *                 - items
+ *               properties:
+ *                 items:
+ *                   type: array
+ *                   items:
+ *                     $ref: '#/components/schemas/Notification'
+ *       400:
+ *         $ref: '#/components/responses/ValidationError'
+ *       401:
+ *         $ref: '#/components/responses/Unauthorized'
+ */
+
 module.exports = {
   async fn() {
     const { currentUser } = this.req;