♻️ rewrite dependency injection system

tests/utils.py

@@ -0,0 +1,14 @@
+from pathlib import Path
+from typing import TYPE_CHECKING, Set
+
+import pytest
+
+if TYPE_CHECKING:
+    from nonebot.plugin import Plugin
+
+
+@pytest.fixture
+def load_plugin(nonebug_init: None) -> Set["Plugin"]:
+    import nonebot
+
+    return nonebot.load_plugins(str(Path(__file__).parent / "plugins"))