oembed: add Grid.is's Calculator Studio

Author: iparamonau

lib/plugins/system/oembed/providers.json

@@ -804,6 +804,14 @@
         ],
         "endpoint": "https://grid.is/api/oembed"
     },
+    {
+        "name": "Calculator Studio",
+        "templates": [
+            "app.calculatorstudio.co/@(.+)"
+        ],
+        "url": "https://grid.is/@{1}",
+        "endpoint": "https://app.calculatorstudio.co/api/oembed"
+    },    
     {
         "name": "Anchor FM",
         "templates": [