Add config.json (HF download-stat query file)

Adds a root config.json so Hugging Face download stats count each splash serve / snapshot_download install. Inert for the Splash runtime, which validates manifest.json only.

config.json

@@ -0,0 +1,19 @@
+{
+  "architectures": [
+    "Qwen38ForCausalLM"
+  ],
+  "model_type": "splash-packed-q8",
+  "format": "splash-packed-q8",
+  "schema_version": 5,
+  "quantization_config": {
+    "quant_method": "native-8bit-tiled",
+    "bits": 8,
+    "group_size": 64
+  },
+  "speculative": {
+    "method": "mtp",
+    "proposal_tokens": 7
+  },
+  "runtime": "https://github.com/npanj/splash/tree/q8",
+  "package_manifest": "manifest.json"
+}