Add SQL request find_citizen_by_name

src/main/resources/sql/functions/citizen/find_citizen_by_name.sql

@@ -0,0 +1,16 @@
+create or replace function find_citizen_by_name(_name json, out resource json) language plpgsql as
+$$
+begin
+    select to_json(t) into resource
+    from (
+        select
+            z.*,
+            find_user_by_id(u.id) as "user"
+        from citizen as z
+        join "user" as u on z.user_id = u.id
+        where z.name->>'first_name' = _name->>'first_name'
+          and z.name->>'last_name' = _name->>'last_name'
+    ) as t;
+end;
+$$;
+