add copy function

assistant.py

@@ -67,6 +67,11 @@ def parse_commands(text):
             context_query = '\n\nThe following is context provided by the user:\n'
             context_query += get_string_from_clipboard() + '\n'
             return text.split('/clipboard ')[1] + context_query
+        case '/copy':
+            blocks = extract_code_block(history[-1]['content'])
+            if len(blocks):
+                copy_string_to_clipboard(blocks[0])
+            return True
         case '/exit':
             exit()
     return False