Make transitions queries async

[whiterabbit1983]

[!IMPORTANT] Make transition queries asynchronous by adding async functions and clients, updating decorators, and fixing minor issues.

• Async Transition Queries:
  • Added create_execution_transition_async in create_execution_transition.py for async transition creation.
  • Updated transition_step in transition_step.py to use create_execution_transition_async.
• Async Client:
  • Introduced get_async_cozo_client in cozo.py for async Cozo client.
• Decorators and Utilities:
  • Added cozo_query_async decorator in utils.py for async query handling.
  • Updated increase_counter in counters.py to support async functions.
• Miscellaneous:
  • Fixed potential None error in chat.py when formatting tools.
  • Added pycozo-async dependency in pyproject.toml.

^{This description was created by for 3a32c7c80a74e70a404d3bd728cab221befec646. It will automatically update as commits are pushed.}