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/entity_embedding.py

@@ -6,7 +6,6 @@ Reference:
 """
 
 from typing import Any
-
 import numpy as np
 import networkx as nx
 from graphrag.leiden import stable_largest_connected_component