Refactor Terminal and AIAgent cleanup

tools/environments/__init__.py

@@ -0,0 +1,13 @@
+"""Hermes execution environment backends.
+
+Each backend provides the same interface (BaseEnvironment ABC) for running
+shell commands in a specific execution context: local, Docker, Singularity,
+SSH, or Modal.
+
+The terminal_tool.py factory (_create_environment) selects the backend
+based on the TERMINAL_ENV configuration.
+"""
+
+from tools.environments.base import BaseEnvironment
+
+__all__ = ["BaseEnvironment"]