create settings module in preparation of aerich

currently, it's only used for tortoise_orm

src/teilchensammler_cli/main.py

@@ -18,6 +18,8 @@ from textual.widgets import (
 )
 from tortoise import Tortoise
 
+from teilchensammler_cli import settings
+
 
 @final
 class SearchBar(Static):
@@ -43,9 +45,7 @@ class SearchBar(Static):
                 id="teilchen-input",
                 type="text",
             )
-            yield Button(
-                "Add", variant="success", classes="search-bar-buttons", id="button-add"
-            )
+            yield Button("Add", variant="success", classes="search-bar-buttons", id="button-add")
             yield Button(
                 "Search",
                 variant="default",
@@ -99,13 +99,14 @@ class AddInventoryScreen(Screen[None]):
 @final
 class SammlerApp(App[None]):
     async def on_mount(self) -> None:
-        await Tortoise.init(
-            db_url="sqlite://db.sqlite3",
-            modules={"models": ["teilchensammler_cli.models"]},
-        )
-        await Tortoise.generate_schemas()
+        await Tortoise.init(config=settings.TORTOISE_ORM_CONFIG)
+        await Tortoise.generate_schemas(safe=True)
         _ = self.push_screen(AddInventoryScreen())
 
+    async def on_unmount(self) -> None:
+        # https://tortoise.github.io/setup.html#the-importance-of-cleaning-up
+        await Tortoise.close_connections()
+
 
 def main() -> None:
     app = SammlerApp()

src/teilchensammler_cli/settings.py

@@ -0,0 +1,14 @@
+TORTOISE_ORM_CONFIG = {
+    "connections": {
+        "default": {
+            "engine": "tortoise.backends.sqlite",
+            "credentials": {"file_path": "db.sqlite3"},
+        },
+    },
+    "apps": {
+        "app": {
+            "models": ["teilchensammer_cli.models", "aerich.models"],
+            "default_connection": "default",
+        }
+    },
+}