sd: load single file model using local config

iopaint/model/original_sd_configs/__init__.py

@@ -0,0 +1,19 @@
+from pathlib import Path
+from typing import Dict
+
+CURRENT_DIR = Path(__file__).parent.absolute()
+
+
+def get_config_files() -> Dict[str, Path]:
+    """
+    - `v1`: Config file for Stable Diffusion v1
+    - `v2`: Config file for Stable Diffusion v2
+    - `xl`: Config file for Stable Diffusion XL
+    - `xl_refiner`: Config file for Stable Diffusion XL Refiner
+    """
+    return {
+        "v1": CURRENT_DIR / "v1-inference.yaml",
+        "v2": CURRENT_DIR / "v2-inference-v.yaml",
+        "xl": CURRENT_DIR / "sd_xl_base.yaml",
+        "xl_refiner": CURRENT_DIR / "sd_xl_refiner.yaml",
+    }