refactor(task): move schedulers and startup/shutdown task into tasks directory

app/tasks/load_achievements.py

@@ -0,0 +1,18 @@
+from __future__ import annotations
+
+import importlib
+
+from app.log import logger
+from app.models.achievement import MEDALS, Medals
+from app.path import ACHIEVEMENTS_DIR
+
+
+def load_achievements() -> Medals:
+    for module in ACHIEVEMENTS_DIR.iterdir():
+        if module.is_file() and module.suffix == ".py":
+            module_name = module.stem
+            module_achievements = importlib.import_module(f"app.achievements.{module_name}")
+            medals = getattr(module_achievements, "MEDALS", {})
+            MEDALS.update(medals)
+            logger.success(f"Successfully loaded {len(medals)} achievements from {module_name}.py")
+    return MEDALS