feat: add preprocessor config

preprocessor_config.json

@@ -0,0 +1,10 @@
+{
+  "crop_pct": 0.875,
+  "do_normalize": true,
+  "do_resize": true,
+  "feature_extractor_type": "ConvNextFeatureExtractor",
+  "image_mean": [0.485, 0.456, 0.406],
+  "image_std": [0.229, 0.224, 0.225],
+  "resample": 3,
+  "size": 224
+}