Introduced beartype (#3460)

### What problem does this PR solve?

Introduced [beartype](https://github.com/beartype/beartype) for runtime
type-checking.

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

graphrag/mind_map_extractor.py

@@ -19,9 +19,9 @@ import collections
 import os
 import re
 import traceback
+from typing import Any
 from concurrent.futures import ThreadPoolExecutor
 from dataclasses import dataclass
-from typing import Any
 
 from graphrag.mind_map_prompt import MIND_MAP_EXTRACTION_PROMPT
 from graphrag.utils import ErrorHandlerFn, perform_variable_replacements