feat(add link): Add a new link to Novu in the backend as an email pro…

…vider (#2110)

This commit introduces a new link to Novu.co at "backend/email-providers"

Novu is an open-source notification infrastructure that allows developers to send notifications to their users through multiple channels.

database/backend/email-providers.json

@@ -33,5 +33,12 @@
         "url": "https://aws.amazon.com/ses/",
         "category": "backend",
         "subcategory": "email-providers"  
+    },
+    {
+        "name": "Novu",
+        "description": "Novu is an open-source notification infrastructure that allows developers to send notifications to their users through multiple channels, including email.",
+        "url": "https://novu.co/",
+        "category": "backend",
+        "subcategory": "email-providers"
     }
 ]