#29 Implement Workgroup (create query)

Create SQL query to get/set workgroup
Add workgroup to article query

src/main/resources/sql/functions/article/find_articles.sql

@@ -22,6 +22,7 @@ begin
         select
             a.*,
             find_citizen_by_id(a.created_by_id) as created_by,
+            find_workgroup_by_id(a.workgroup_id) as workgroup,
             count_vote(a.id) as votes,
             count_opinion(a.id) as opinions,
             zdb.score(a.ctid) _score