refactor: cleanup skeleton, setup supabase properly

supabase/migrations/20250530085401_study_spaces_skeleton.sql

@@ -40,17 +40,3 @@ FOR EACH ROW EXECUTE FUNCTION handle_updated_at();
 CREATE TRIGGER study_space_images_updated_at
 AFTER UPDATE ON study_space_images
 FOR EACH ROW EXECUTE FUNCTION handle_updated_at();
-
--- Security
--- ALTER TABLE study_spaces ENABLE ROW LEVEL SECURITY;
--- ALTER TABLE study_space_images ENABLE ROW LEVEL SECURITY;
-
--- CREATE POLICY "Allow all users to view study spaces"
---     ON study_spaces
---     FOR SELECT
---     USING (true);
-
--- CREATE POLICY "Allow all users to view study space images"
---     ON study_space_images
---     FOR SELECT
---     USING (true);