General codebase refactor and cleanup

[FrancescoCaracciolo]

To make Newelle more extendible, easier to maintain and to get people contribute to it, we should make a general codebase cleanup.

1. Change the directory structure
   I propose this directory structure:

project_root/
├── main.py
├── window.py
├── settings.py
├── extensions.py
├── constants.py
├── handlers/
│   ├── __init__.py
│   ├── handler.py
│   ├── llm/
│   │   ├── __init__.py
│   │   ├── base.py
│   │   ├── openai.py
│   │   ├── claude.py
│   │   ├── bing.py
│   │   ├── gpt4all.py
│   │   ├── groq.py
│   │   ├── ollama.py
│   │   ├── gemini.py
│   │   └── mistral.py
│   ├── tts/
│   │   ├── __init__.py
│   │   ├── base.py
│   │   ├── elevenlabs.py
│   │   ├── gtts.py
│   │   └── espeak.py
│   └── stt/
│       ├── __init__.py
│       ├── base.py
│       ├── whisper.py
│       ├── google.py
│       ├── sphinx.py
│       ├── vosk.py
│       └── witai.py
├── ui/
│   ├── __init__.py
│   ├── extension.py
│   ├── presentation.py
│   ├── profile.py
│   ├── screenrecorder.py
│   ├── shortcuts.py
│   ├── thread_editing.py
│   └── widgets/
│       ├── __init__.py
│       ├── copybox.py
│       ├── multiline_entry.py
│       ├── bar_chart.py
│       ├── profile_row.py
│       └── file.py
└── utils/
    ├── __init__.py
    ├── image_utils.py
    ├── system_utils.py
     ... from extra.py

2. Add documentation to missing methods
3. Clean up code style with flake8 standard or similar
4. Local LLM handler should be only built as handler and not have special code in settings
5. Maybe add more widgets in separated files to simplify window.py

Does it look good?

[qwersyk]

Yeah, it looks great! I think it’s a solid idea and will definitely make the code easier to work with.