fix: reset context between tasks

[johnnyaug]

Closes #399.

Suggesting to use the reset() method of the agent to solve this. I chose not to reset the long term memory, with the thought it could be interesting for subsequent tasks. We may want to change this in the future.

[rbren]

This seems like it will probably work! I'll give it a try today

[rbren]

Seems to do the trick. Thank you!