chore(gitignore): ignore db-shm, .chainlit, and pgdata directories

Author: BrunoV21

.gitignore

@@ -186,4 +186,6 @@ examples/hf_demo_space/chainlit.md
 
 examples/hf_demo_space/public/
 database.db-journal
+database.db-shm
 .chainlit/
+pgdata/