Feature: Add tandoor widget (#3060)

---------

Co-authored-by: shamoon <4887959+shamoon@users.noreply.github.com>

docs/widgets/services/tandoor.md

@@ -0,0 +1,15 @@
+---
+title: Tandoor
+description: Tandoor Widget Configuration
+---
+
+Generate a user API key under `Settings > API  > Generate`. For the token's scope, use `read`.
+
+Allowed fields: `["users", "recipes", "keywords"]`.
+
+```yaml
+widget:
+  type: tandoor
+  url: http://tandoor-frontend.host.or.ip
+  key: tandoor-api-token
+```