Adding AgentLogger

[matthewli125]

Adding a logger object "AgentLogger" to save run information to a sqlite3 file for easier record keeping and analysis.

Main changes:

• Update low fidelity agent to invoke AgentLogger on step callback.
• Update low fidelity agent constructor to take some extra metadata for easier logging.
• Add unit tests for logger, update existing unit tests

Other changes:

• update .gitignore to include .db files
• fixed some pylance issues; update smolagent invocations and specify type for tool inputs