added Testimonial collection

src/api/testimonial/content-types/testimonial/schema.json

+{
+  "kind": "collectionType",
+  "collectionName": "testimonials",
+  "info": {
+    "singularName": "testimonial",
+    "pluralName": "testimonials",
+    "displayName": "Testimonials",
+    "description": ""
+  },
+  "options": {
+    "draftAndPublish": true
+  },
+  "pluginOptions": {},
+  "attributes": {
+    "Testimonial": {
+      "type": "component",
+      "repeatable": true,
+      "component": "layout.testimonial"
+    }
+  }
+}

src/api/testimonial/controllers/testimonial.js

+'use strict';
+
+/**
+ * testimonial controller
+ */
+
+const { createCoreController } = require('@strapi/strapi').factories;
+
+module.exports = createCoreController('api::testimonial.testimonial');

src/api/testimonial/routes/testimonial.js

+'use strict';
+
+/**
+ * testimonial router
+ */
+
+const { createCoreRouter } = require('@strapi/strapi').factories;
+
+module.exports = createCoreRouter('api::testimonial.testimonial');

src/api/testimonial/services/testimonial.js

+'use strict';
+
+/**
+ * testimonial service
+ */
+
+const { createCoreService } = require('@strapi/strapi').factories;
+
+module.exports = createCoreService('api::testimonial.testimonial');