[v3] Add key features to config.json

config.json

@@ -1248,6 +1248,37 @@
     ]
   },
   "concepts": [],
-  "key_features": [],
+  "key_features": [
+    {
+      "title": "Modern",
+      "content": "Scala is relatively young, and design decisions are aimed to address criticisms of Java.",
+      "icon": "features-functional"
+    },
+    {
+      "title": "Multi-paradigm",
+      "content": "Scala combines object-oriented and functional programming in one concise, high-level language.",
+      "icon": "features-oop"
+    },
+    {
+      "title": "Statically typed",
+      "content": "Scala is statically typed and supports type inference, catching errors early.",
+      "icon": "features-strongly-typed"
+    },
+    {
+      "title": "Lazy computation",
+      "content": "Scala evaluates expressions only when required, this increases performance.",
+      "icon": "features-lazy"
+    },
+    {
+      "title": "Immutability",
+      "content": "Scala uses an immutability concept. Each declared variable is immutable by default.",
+      "icon": "features-declarative"
+    },
+    {
+      "title": "Widely-used",
+      "content": "Scala is being used by some of the world's tech giants.",
+      "icon": "features-generic"
+    }
+  ],
   "tags": []
 }