catalog-backend: type changeset

Signed-off-by: Vincenzo Scamporlino <vincenzos@spotify.com>

.changeset/rotten-hairs-attack.md

@@ -0,0 +1,25 @@
+---
+'@backstage/plugin-catalog-backend': minor
+---
+
+Add support for specifying an entity `type` in `catalog.rules.allow` rules within the catalog configuration.
+
+For example, this enables allowing all `Template` entities with the type `website`:
+
+```diff
+  catalog:
+    rules:
+      - allow:
+          - Component
+          - API
+          - Resource
+          - System
+          - Domain
+          - Location
++     - allow:
++         - kind: Template
++           type: website
+        locations:
+          - type: url
+            pattern: https://github.com/org/*\/blob/master/*.yaml
+```