feature - async supervisor support

[finnjclancy]

if async tools were executed, they were forced to call synchronous supervisor methods

so i added async supervisor support across the entire supervision system

still maintain full backward compatibility

main features from this commit -

• async supervisors checked first, sync as fallback for backward compatibility
• made 15 new tests to cover all async functionalities
• no breaking changes + dependencies and conig updated

files changed and why:

src/talos/tools/base.py

• added AsyncSupervisor interface and updated SupervisedTool for async support

src/talos/hypervisor/supervisor.py

• added AsyncSupervisor base class and async implementations (AsyncRuleBasedSupervisor, AsyncSimpleSupervisor)

src/talos/tools/supervised_tool.py

• added async_supervisor field and updated arun method with fallback to sync

examples/example.py

• added AsyncAlternatingSupervisor example imp.

tests/test_supervised_tool.py

• added async supervisor tests and fallback behavior tests

tests/test_supervisor.py

• added async rule-based supervisor tests

tests/test_async_supervisors.py

• created comprehensive async supervisor test

tests/simple_supervisor.py

• added AsyncSimpleSupervisor for tests

pyproject.toml

• added pytest-asyncio dependency and configuration so you can test this update