add inference api

rvc/utils/api/api.py

@@ -0,0 +1,11 @@
+from dotenv import load_dotenv
+from fastapi import FastAPI
+import uvicorn
+
+from rvc.utils.api.endpoints import inference
+
+load_dotenv()
+
+app = FastAPI()
+
+app.include_router(inference.router)