removed marimo session information from repo and added notebooks/__marimo__ to .gitignore

Author: bocekout

.gitignore

@@ -150,8 +150,9 @@ oryx-build-commands.txt
 docs/cli.md
 .pixi
 
-# Marimo's internal directory, persists even with ephemeral uvx installs
+# Marimo session info
 __marimo__/ 
+notebooks/__marimo__/
 
 # SQLite database
 message_log.db