Implement OCR engine architecture with base, factory, and specific engines

app/ocr/none.py

@@ -0,0 +1,15 @@
+from __future__ import annotations
+
+import numpy as np
+
+from app.ocr.base import OcrResult
+
+
+class NoOcrEngine:
+    name = "none"
+
+    def __init__(self, config: dict) -> None:
+        self.config = config
+
+    def read_label(self, frame_bgr: np.ndarray, bbox: tuple[int, int, int, int]) -> OcrResult:
+        return OcrResult(engine=self.name)