Upgrade kf_config.json to v2 (nested config + dtype)

kf_config.json

@@ -1,34 +1,38 @@
 {
   "library_name": "kerasformers",
-  "kerasformers_version": "1.1.3",
+  "kerasformers_version": "1.2.1",
   "model_module": "kerasformers.models.depth_anything_v1",
   "model_class": "DepthAnythingV1DepthEstimation",
   "variant": "depth_anything_base",
   "weights": "model.weights.h5",
+  "schema_version": 2,
+  "dtype": "float32",
   "model_type": "depth_anything",
-  "backbone_dim": 768,
-  "backbone_depth": 12,
-  "backbone_num_heads": 12,
-  "out_indices": [
-    9,
-    10,
-    11,
-    12
-  ],
-  "neck_hidden_sizes": [
-    96,
-    192,
-    384,
-    768
-  ],
-  "fusion_hidden_size": 128,
-  "reassemble_factors": [
-    4,
-    2,
-    1,
-    0.5
-  ],
-  "depth_estimation_type": "relative",
-  "max_depth": 1.0,
-  "image_size": 518
+  "vision_config": {
+    "backbone_dim": 768,
+    "backbone_depth": 12,
+    "backbone_num_heads": 12,
+    "out_indices": [
+      9,
+      10,
+      11,
+      12
+    ],
+    "neck_hidden_sizes": [
+      96,
+      192,
+      384,
+      768
+    ],
+    "fusion_hidden_size": 128,
+    "reassemble_factors": [
+      4,
+      2,
+      1,
+      0.5
+    ],
+    "depth_estimation_type": "relative",
+    "max_depth": 1.0,
+    "image_size": 518
+  }
 }