Add support for billing export in 0-org-setup (#3347)

* Add support for billing export in 0-org-setup

* Merge branch 'master' into add-billing-export-support

* Refactored billing export with adding support for bigquery_datasets in project_factory

* Renamed bigquery_dataset to datasets

* Fixed defaults.schema.md

* Fixed default.schema.md again

* Cleanup md's

* Fixed boilerplate

* Fixed JSON schema

* reword README, rename project file

* Moved dataset_id to the key of the map

---------

Co-authored-by: Julio Castillo <jccb@google.com>
Co-authored-by: Ludovico Magnocavallo <ludomagno@google.com>

modules/project-factory/projects-bigquery.tf

@@ -0,0 +1,44 @@
+/**
+ * Copyright 2025 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.
+ */
+
+locals {
+  projects_bigquery_datasets = flatten([
+    for k, v in local.projects_input : [
+      for name, opts in lookup(v, "datasets", {}) : {
+        project_key   = k
+        project_name  = v.name
+        id            = name
+        friendly_name = lookup(opts, "friendly_name", null)
+        location      = lookup(opts, "location", null)
+      }
+    ]
+  ])
+}
+
+module "bigquery-datasets" {
+  source = "../bigquery-dataset"
+  for_each = {
+    for k in local.projects_bigquery_datasets : "${k.project_key}/${k.id}" => k
+  }
+  project_id    = module.projects[each.value.project_key].project_id
+  id            = each.value.id
+  friendly_name = each.value.friendly_name
+  location = coalesce(
+    local.data_defaults.overrides.bigquery_location,
+    lookup(each.value, "location", null),
+    local.data_defaults.defaults.bigquery_location
+  )
+}