* Add the environment variable: OPEN_BROWSER
* Add configurable browser launching with custom arguments
- Update `config.py` to include options for specifying the browser and its arguments for opening URLs.
- Modify `main.py` to use the configured browser settings from `config.py` to launch the web page.
- Enhance `config_loader.py` to process path-like strings by expanding and normalizing paths, which supports the configuration improvements.
* Add support for the following models:
"gpt-4o", "gpt-4o-2024-05-13"
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Co-authored-by: binary-husky <qingxu.fu@outlook.com>
