Refactoring code for modular approach

.env

@@ -1,4 +1,9 @@
 # .env.example
+
+    PROJECT_NAME: str = "Ecommerce Backend API with Marketplace Support"
+    DESCRIPTION: str = "Advanced product management system with JWT authentication"
+    VERSION: str = "0.0.1"
+
 # Database Configuration
 # DATABASE_URL=postgresql://username:password@localhost:5432/ecommerce_db
 # For development, you can use SQLite:
@@ -16,8 +21,8 @@ DEBUG=False
 
 # Rate Limiting
 RATE_LIMIT_ENABLED=True
-DEFAULT_RATE_LIMIT=100
-DEFAULT_WINDOW_SECONDS=3600
+RATE_LIMIT_REQUESTS=100
+RATE_LIMIT_WINDOW=3600
 
 # Logging
 LOG_LEVEL=INFO