Add settings module

src/lib/__init__.py

@@ -0,0 +1,3 @@
+from .settings import settings
+
+__all__ = ["settings"]

src/lib/settings.py

@@ -0,0 +1,13 @@
+from pydantic_settings import BaseSettings
+from pydantic import Field
+from pathlib import Path
+
+
+class Settings(BaseSettings):
+    db_url: Path = Field(Path("pjl.duckdb"), env="DB_URL")
+
+    class Config:
+        env_file = ".env"
+
+
+settings = Settings()