Add shadowtls (#49)

* Add shadowtls outbound

* Add shadowtls inbound

* Add shadowtls example

* Add shadowtls documentation

docs/configuration/inbound/shadowtls.md

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+### Structure
+
+```json
+{
+  "type": "shadowtls",
+  "tag": "st-in",
+
+  ... // Listen Fields
+
+  "handshake": {
+    "server": "google.com",
+    "server_port": 443,
+    
+    ... // Dial Fields
+  }
+}
+```
+
+### Listen Fields
+
+See [Listen Fields](/configuration/shared/listen) for details.
+
+
+### Fields
+
+#### handshake
+
+==Required==
+
+Handshake server address and [dial options](/configuration/shared/dial).
+

docs/configuration/inbound/shadowtls.zh.md

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+### 结构
+
+```json
+{
+  "type": "shadowtls",
+  "tag": "st-in",
+
+  ... // 监听字段
+
+  "handshake": {
+    "server": "google.com",
+    "server_port": 443,
+
+    ... // 拨号字段
+  }
+}
+```
+
+### 监听字段
+
+参阅 [监听字段](/zh/configuration/shared/listen/)。
+
+### 字段
+
+#### handshake
+
+==必填==
+
+握手服务器地址和 [拨号参数](/zh/configuration/shared/dial/)。

docs/configuration/outbound/shadowtls.md

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+### Structure
+
+```json
+{
+  "type": "shadowtls",
+  "tag": "st-out",
+  
+  "server": "127.0.0.1",
+  "server_port": 1080,
+  "tls": {},
+
+  ... // Dial Fields
+}
+```
+
+### Fields
+
+#### server
+
+==Required==
+
+The server address.
+
+#### server_port
+
+==Required==
+
+The server port.
+
+#### tls
+
+==Required==
+
+TLS configuration, see [TLS](/configuration/shared/tls/#outbound).
+
+### Dial Fields
+
+See [Dial Fields](/configuration/shared/dial) for details.

docs/configuration/outbound/shadowtls.zh.md

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+### 结构
+
+```json
+{
+  "type": "shadowtls",
+  "tag": "st-out",
+  
+  "server": "127.0.0.1",
+  "server_port": 1080,
+  "tls": {},
+
+  ... // 拨号字段
+}
+```
+
+### 字段
+
+#### server
+
+==必填==
+
+服务器地址。
+
+#### server_port
+
+==必填==
+
+服务器端口。
+
+#### tls
+
+==必填==
+
+TLS 配置, 参阅 [TLS](/zh/configuration/shared/tls/#outbound)。
+
+### 拨号字段
+
+参阅 [拨号字段](/zh/configuration/shared/dial/)。

docs/examples/shadowtls.md

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+#### Server
+
+```json
+{
+  "inbounds": [
+    {
+      "type": "shadowtls",
+      "listen": "::",
+      "listen_port": 4443,
+      "handshake": {
+        "server": "google.com",
+        "server_port": 443
+      },
+      "detour": "shadowsocks-in"
+    },
+    {
+      "type": "shadowsocks",
+      "tag": "shadowsocks-in",
+      "listen": "127.0.0.1",
+      "method": "2022-blake3-aes-128-gcm",
+      "password": "8JCsPssfgS8tiRwiMlhARg=="
+    }
+  ]
+}
+```
+
+#### Client
+
+```json
+{
+  "outbounds": [
+    {
+      "type": "shadowsocks",
+      "method": "2022-blake3-aes-128-gcm",
+      "password": "8JCsPssfgS8tiRwiMlhARg==",
+      "detour": "shadowtls-out",
+      "multiplex": {
+        "enabled": 1,
+        "max_connections": 4,
+        "min_streams": 4
+      }
+    },
+    {
+      "type": "shadowtls",
+      "tag": "shadowtls-out",
+      "server": "127.0.0.1",
+      "server_port": 4443,
+      "tls": {
+        "enabled": true,
+        "server_name": "google.com"
+      }
+    }
+  ]
+}
+```