add: Added default prompts for agency agreement and some multi-language translations

flutter/lib/desktop/pages/desktop_setting_page.dart

@@ -2051,7 +2051,9 @@ void changeSocks5Proxy() async {
                 Expanded(
                   child: TextField(
                     decoration: InputDecoration(
-                        errorText: proxyMsg.isNotEmpty ? proxyMsg : null),
+                        errorText: proxyMsg.isNotEmpty ? proxyMsg : null,
+                        hintText: translate("Default proxy protocol is socks5"),
+                    ),
                     controller: proxyController,
                     autofocus: true,
                   ),

src/lang/cn.rs

@@ -240,6 +240,7 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Invalid folder name", "无效文件夹名称"),
         ("Socks5 Proxy", "Socks5 代理"),
         ("Socks5/Http(s) Proxy", "Socks5/Http(s) 代理"),
+        ("Default proxy protocol is socks5", "默认代理协议为socks5"),
         ("Discovered", "已发现"),
         ("install_daemon_tip", "为了开机启动，请安装系统服务。"),
         ("Remote ID", "远程 ID"),

src/lang/en.rs

@@ -61,6 +61,7 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Remove from Favorites", "Remove from favorites"),
         ("Socks5 Proxy", "Socks5 proxy"),
         ("Socks5/Http(s) Proxy", "Socks5/Http(s) proxy"),
+        ("Default proxy protocol is socks5", "Default proxy protocol is socks5"),
         ("install_daemon_tip", "For starting on boot, you need to install system service."),
         ("Are you sure to close the connection?", "Are you sure you want to close the connection?"),
         ("One-Finger Tap", "One-finger tap"),