Add initial project structure with configuration, utilities, and API endpoints

config/settings.py

@@ -0,0 +1,14 @@
+# config/settings.py
+from pydantic_settings import BaseSettings
+from typing import Optional
+
+class Settings(BaseSettings):
+    API_KEY: str
+    OPENAI_API_KEY: str
+    DATABASE_URL: str
+    SECRET_KEY: str
+    ALGORITHM: str = "HS256"
+    ACCESS_TOKEN_EXPIRE_MINUTES: int = 30
+    
+    class Config:
+        env_file = ".env"