IOPaint-1.5.3

• add --remove-bg-model briaai/RMBG-2.0 from: https://huggingface.co/briaai/RMBG-2.0
• add --remove-bg-device, device(cpu/cuda/mps) for remove background plugin, only supports briaai models(briaai/RMBG-1.4 and briaai/RMBG-2.0). For other remvoe-bg model(e.g Birefnet) you can install gpu version of rembg package to use gpu, see more at: https://github.com/danielgatis/rembg?tab=readme-ov-file#installation
• fix --output-dir not work: #597
• fix all 404 error in the terminal
• fix remove-bg plugin requirements
• Frontend
  • now support smaller brushsize
  • better error handle