refactor!: replace attrs with dataclass

requirements.txt

@@ -1,3 +1,2 @@
-attrs==23.1.0
 numpy==1.26.1
 opencv-python==4.8.1.78

src/arcaea_offline_ocr/b30/shared.py

@@ -1,10 +1,9 @@
+from dataclasses import dataclass
 from datetime import datetime
 from typing import Optional
 
-import attrs
 
-
-@attrs.define
+@dataclass
 class B30OcrResultItem:
     rating_class: int
     score: int

src/arcaea_offline_ocr/device/common.py

@@ -1,9 +1,8 @@
+from dataclasses import dataclass
 from typing import Optional
 
-import attrs
 
-
-@attrs.define
+@dataclass
 class DeviceOcrResult:
     rating_class: int
     pure: int