docs: add config in root directory

config.yaml

@@ -0,0 +1,23 @@
+name: cryofm-v2
+organization: ByteDance-Seed
+schema_version: 1
+
+variants:
+  cryofm2-pretrain:
+    path: cryofm2-pretrain
+    weights: model.safetensors
+    config: config.yaml
+    description: "Unconditional pretrained model for general density map generation"
+  cryofm2-emhancer:
+    path: cryofm2-emhancer
+    weights: model.safetensors
+    config: config.yaml
+    description: "Fine-tuned model for density map enhancement (EMhancer style)"
+  cryofm2-emready:
+    path: cryofm2-emready
+    weights: model.safetensors
+    config: config.yaml
+    description: "Fine-tuned model for density map enhancement (EMReady style)"
+
+recommended:
+  default_variant: cryofm2-pretrain