docs: update README to include database connection cleanup instructions

README.md

@@ -85,6 +85,14 @@ await db.delete('Users', 1);
 console.log('Record deleted');
 ```
 
+### Cleaning Up
+
+When you're done with database operations, it's good practice to close the connection:
+
+```javascript
+db.close();
+```
+
 ## API Reference 📘
 
 ### Constructor
@@ -148,6 +156,14 @@ Deletes a specific record by its ID from the specified object store.
 
 **Returns**: `Promise<undefined>`
 
+---
+
+#### `close()`
+
+Closes the active database connection. This is useful for cleanup when the database connection is no longer needed.
+
+**Returns**: `void`
+
 ## Error Handling ⚠️
 
 All methods reject with an appropriate error if an operation fails. Use `try-catch` blocks or `.catch` handlers to manage errors gracefully: