Original code by @p0llux12 - Discord
- Introduced `SurfsharkVPN` class for proxy service integration.
- Updated configuration to include `surfsharkvpn` in proxy providers.
- Removed legacy `nordvpn` configuration from YAML.
- Enhanced `dl.py` and `search.py` to utilize `SurfsharkVPN`.
* Updated the `services` directory assignment to ensure it is always treated as a list, improving consistency in configuration handling. Allows to provide multiple different service folders.
