• Added DeepFilterNet (ONNX) as an optional denoiser, swappable
  via config alongside RNNoise
• Added adjustable noise removal slider (0-100%) with separate
  on/off toggle
• Added noise meter: shows how much noise is being removed +
  estimated room noise floor

phase 2 done I guess 🎉

will improve the ui
plan to use tauri later on but for now tkinter will do