Add `pyaudio` and `silero_vad` as dependencies for PyInstaller hooks

Add `loguru` to hidden imports in `hook-voice_dialogue.py`

Update `voice_dialogue.spec`: add comments for build stages and disable macOS `.app` bundle configuration

Organize assets: rename icons to `electron-app/assets/icons` and add `dmg_bg.png` to `electron-app/assets/images`.

Add `appicon.png` to project build icons

Add `moyoyo.icns` icon file to project

Add PyInstaller hooks and spec file for project packaging.