Update examples to work with the separate controller and lm modules

examples/doc_merge/doc_merge.py

@@ -14,7 +14,7 @@ import json
 import csv
 from statistics import fmean
 from typing import Dict, List, Callable, Set, Union
-from graph_of_thoughts import controller, operations, prompter, parser
+from graph_of_thoughts import controller, language_models, operations, prompter, parser
 
 
 class DocMergePrompter(prompter.Prompter):
@@ -714,8 +714,8 @@ def run(
                     f"Budget has been depleted, stopping. Method {method.__name__} has not been run."
                 )
                 break
-            lm = controller.ChatGPT(
-                "../../graph_of_thoughts/controller/config.json",
+            lm = language_models.ChatGPT(
+                "../../graph_of_thoughts/language_models/config.json",
                 model_name=lm_name,
                 cache=True,
             )