Remove pytest configuration file and update test files for async compatibility

- Deleted `pytest.ini` to streamline test configuration.
- Added `pytest_asyncio` plugin support in `conftest.py`.
- Marked `test_monitor` as an async test to ensure proper execution in an asynchronous context.

tests/conftest.py

@@ -11,6 +11,9 @@ from database.db import BotDB
 # Импортируем моки в самом начале
 import tests.mocks
 
+# Настройка pytest-asyncio
+pytest_plugins = ('pytest_asyncio',)
+
 
 @pytest.fixture(scope="session")
 def event_loop():