Add config.json so the Hub can count downloads

config.json

@@ -0,0 +1,76 @@
+{
+  "model_type": "executorch-pte",
+  "format": "pte",
+  "framework": "ExecuTorch",
+  "source": "facebook/sam2.1-hiera-tiny",
+  "inputs": [
+    [
+      1,
+      256,
+      64,
+      64
+    ],
+    [
+      1,
+      32,
+      256,
+      256
+    ],
+    [
+      1,
+      64,
+      128,
+      128
+    ],
+    [
+      1,
+      1,
+      1,
+      2
+    ],
+    [
+      1,
+      1,
+      1
+    ]
+  ],
+  "variants": [
+    {
+      "file": "sam21_tiny_decoder_coreml_all.pte",
+      "backend": "coreml",
+      "precision": "fp16",
+      "size_mb": 12.7
+    },
+    {
+      "file": "sam21_tiny_decoder_xnnpack_fp16.pte",
+      "backend": "xnnpack",
+      "precision": "fp16",
+      "size_mb": 12.6
+    },
+    {
+      "file": "sam21_tiny_decoder_xnnpack_fp32.pte",
+      "backend": "xnnpack",
+      "precision": "fp32",
+      "size_mb": 24.7
+    },
+    {
+      "file": "sam21_tiny_encoder_coreml_all.pte",
+      "backend": "coreml",
+      "precision": "fp16",
+      "size_mb": 70.0
+    },
+    {
+      "file": "sam21_tiny_encoder_xnnpack_fp16.pte",
+      "backend": "xnnpack",
+      "precision": "fp16",
+      "size_mb": 55.6
+    },
+    {
+      "file": "sam21_tiny_encoder_xnnpack_fp32.pte",
+      "backend": "xnnpack",
+      "precision": "fp32",
+      "size_mb": 109.2
+    }
+  ],
+  "note": "ExecuTorch .pte exports. See README.md for variant selection and run instructions."
+}