add: int model for project owners

warehouse/dbt/models/intermediate/directory/int_project_owners.sql

@@ -0,0 +1,18 @@
+WITH ranked_repos AS (
+  SELECT
+    project_id,
+    owner,
+    star_count,
+    ROW_NUMBER() OVER (
+      PARTITION BY project_id ORDER BY star_count DESC
+    ) AS row_number,
+    COUNT(DISTINCT owner) OVER (PARTITION BY project_id) AS num_github_owners
+  FROM {{ ref('stg_ossd__repositories_by_project') }}
+)
+
+SELECT
+  project_id,
+  num_github_owners,
+  LOWER(owner) AS primary_github_owner
+FROM ranked_repos
+WHERE row_number = 1