feat: merge upstream dev branch

- Add Gluetun dynamic VPN-to-HTTP proxy provider
   - Add remote services and authentication system
   - Add country code utilities
   - Add Docker binary detection
   - Update proxy providers

unshackle/core/config.py

@@ -103,6 +103,8 @@ class Config:
         self.debug: bool = kwargs.get("debug", False)
         self.debug_keys: bool = kwargs.get("debug_keys", False)
 
+        self.remote_services: list[dict] = kwargs.get("remote_services") or []
+
     @classmethod
     def from_yaml(cls, path: Path) -> Config:
         if not path.exists():