[enh] add engine using API from "The Art Institute of Chicago"

searx/settings.yml

@@ -185,6 +185,11 @@ engines:
       require_api_key: false
       results: HTML
 
+  - name : artic
+    engine : artic
+    shortcut : arc
+    timeout : 4.0
+
   - name : arxiv
     engine : arxiv
     shortcut : arx