Refactor text chunking implementation and update configuration

- Moved SentenceTextChunker and SentenceTextChunkerConfig to the utils module for better organization.
- Updated pytest.ini to include the current directory in the Python path.
- Added a new utils module with shared utility helpers.
- Adjusted import paths in the test files to reflect the new location of text chunking classes.

pytest.ini

@@ -1,3 +1,4 @@
 [pytest]
+pythonpath = .
 markers =
-    integration: marks tests that need access to external services
+    integration: marks tests that need access to external services

src/api/endpoints.py

@@ -7,7 +7,7 @@ from fastgpt_client.exceptions import (
 )
 from ..core.fastgpt_client import get_fastgpt_client
 from ..core.config import Config
-from ..voice.text_chunker import SentenceTextChunker, SentenceTextChunkerConfig
+from ..utils.text_chunker import SentenceTextChunker, SentenceTextChunkerConfig
 from loguru import logger
 import json
 import re

src/utils/__init__.py

@@ -0,0 +1 @@
+"""Shared utility helpers."""

test/test_text_chunker.py

@@ -1,4 +1,4 @@
-from src.voice.text_chunker import SentenceTextChunker, SentenceTextChunkerConfig
+from src.utils.text_chunker import SentenceTextChunker, SentenceTextChunkerConfig
 
 
 def test_chinese_sentence_chunks_wait_for_lookahead():