Create template for adding a new action

[TanGentleman]

This will help organize how to add a generic ActionType or a new action for a task type that has existing state logic.

A successful GitHub commit diff should be entirely isolated to the tangents folder.

• Update classes/actions.py with the new ActionType.
• Update nodes.py with the logic changes to start_action and handle_action_result
• Update utils/execute_action.py with logic for action execution
• Optional: If needed, add an action arg handler function to action_utils.py
• Optional: Maintain readability by defining helper functions in a file specific to the task scope. Separate concerns!

I am working on a guide for implementing new types of agent tasks with custom Actions.

[TanGentleman]

This is a great start, but building on top of Augmenta still needs to be smoother!

For it to be more extensible:

• Move all logic for new Action/Tasks to wrapper functions in tangents/core/
• Defining action and task types should be done without needing to modify nodes.py at all.