feat: add __init__.py for Hermes plugin registration

__init__.py

@@ -0,0 +1,13 @@
+"""
+Hermes Session Cleaner plugin.
+
+CLI tool for cleaning up Hermes session DB — deletes short conversations,
+generates missing titles.
+
+Usage (from terminal, not as slash command):
+    python hermes_cleaner.py [--dry-run] [--min-messages N] [--no-delete] [--no-title]
+"""
+
+def register(ctx) -> None:
+    """Session-cleaner is a CLI tool, no slash commands registered."""
+    pass