Added Proxy Providers System

Signed-off-by: hax <hax@lainlounge.xyz>

proxy_providers/sandvpn_provider.py

@@ -0,0 +1,14 @@
+import requests
+from proxy_provider import ProxyProvider
+
+class SandVPNProvider(ProxyProvider):
+    """
+    Fetch proxies from SandVPN browser extension
+    """
+    PROXIES_LIST_URL = "https://nnp.nnchan.ru/mahoproxy.php?u=https://api.sandvpn.com/fetch-free-proxys"
+
+    def fetch_proxies(self):
+        """Fetch proxies from SandVPN."""
+        response = requests.get(self.PROXIES_LIST_URL, timeout=5)
+        response.raise_for_status()
+        return response.json()