refactor(backend): ♻️ add initial support for global dependency injection

mealie/core/config.py

@@ -173,3 +173,13 @@ class AppSettings(BaseSettings):
 
 
 settings = AppSettings()
+
+
+def get_app_dirs() -> AppDirectories:
+    global app_dirs
+    return app_dirs
+
+
+def get_settings() -> AppSettings:
+    global settings
+    return settings

mealie/db/database.py

@@ -1,3 +1,10 @@
+from functools import lru_cache
+
 from .data_access_layer import DatabaseAccessLayer
 
 db = DatabaseAccessLayer()
+
+
+@lru_cache
+def get_database():
+    return db