Add asset_feeds to resman modules (#3658)

* Add asset_feeds to resman modules

* Add examples and update readmes

* Extend pubsub_topic context to project and folder modules

* Use pubsub_topic context for pubsub_destination

* Update readmes and add project-factory asset_feed example

* Update context tests

* Update schemas

modules/folder/assets.tf

@@ -0,0 +1,46 @@
+/**
+ * Copyright 2026 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+resource "google_cloud_asset_folder_feed" "default" {
+  for_each        = var.asset_feeds
+  billing_project = each.value.billing_project
+  folder          = local.folder_id
+  feed_id         = each.key
+  content_type    = each.value.content_type
+
+  asset_types = each.value.asset_types
+  asset_names = each.value.asset_names
+
+  feed_output_config {
+    pubsub_destination {
+      topic = lookup(
+        local.ctx.pubsub_topics,
+        each.value.feed_output_config.pubsub_destination.topic,
+        each.value.feed_output_config.pubsub_destination.topic
+      )
+    }
+  }
+
+  dynamic "condition" {
+    for_each = each.value.condition == null ? [] : [each.value.condition]
+    content {
+      expression  = condition.value.expression
+      title       = condition.value.title
+      description = condition.value.description
+      location    = condition.value.location
+    }
+  }
+}