增加PROXY_SUPPLEMENT变量

1、增加proxychains4模块，用于解决pip在socks5代理时，pip无法使用全局代理的问题
2、增加`PROXY_SUPPLEMENT`变量，可以手动控制，实现使用镜像站进行更新时，但缺少pip镜像站或者GitHub镜像站时，可以使用全局代理补全缺失的代理

urlparse.py

@@ -0,0 +1,53 @@
+import sys
+from urllib.parse import urlparse
+
+
+def parse_url(url):
+    parsed_url = urlparse(url)
+
+    # 提取各个部分
+    protocol = parsed_url.scheme or ""
+    username = parsed_url.username or ""
+    password = parsed_url.password or ""
+    hostname = parsed_url.hostname or ""
+    port = parsed_url.port or ""
+
+    if hostname:
+        hostname = hostname.lower()
+
+    if not port:
+        if protocol == "https":
+            port = 443
+        elif protocol == "http":
+            port = 80
+        elif protocol in {"socks5", "socks5h", "socks4", "socks4a"}:
+            port = 1080
+
+    # socks协议转换，适配proxychains4的临时命令不支持的socks4a与socks5h
+    if protocol:
+        protocol = protocol.lower()
+        if protocol in {"socks5", "socks5h"}:
+            protocol = "socks5"
+        elif protocol in {"socks4", "socks4a"}:
+            protocol = "socks4"
+
+    # 打印提取的部分
+    print(f"SCHEME:{protocol}")
+    print(f"USERNAME:{username}")
+    print(f"PASSWORD:{password}")
+    print(f"HOST:{hostname}")
+    print(f"PORT:{port}")
+
+
+if __name__ == "__main__":
+    # 参数不全，直接返回空解析结果
+    if len(sys.argv) != 2:
+        print(f"SCHEME:''")
+        print(f"USERNAME:''")
+        print(f"PASSWORD:''")
+        print(f"HOST:''")
+        print(f"PORT:''")
+
+    # 参数全，解析URL
+    PROXY_HOST = sys.argv[1]
+    parse_url(url=PROXY_HOST)