Custom endpoint for Inference #1378

Proposal

I'm using ComfyUI through the Inference panel, but I also use ComfyUI for SillyTavern (hosted elsewhere), which means the listen IP has to be done on something else than the default. This, however, breaks the Inference <-> ComfyUI connection.

My suggestion is either the possibility for using a custom endpoint (the user can just provide address), or it should dynamically use the "--listen" setting from ComfyUI, rather then being hardcoded to 127.0.01