feat: 完成 M2 mosh（LAN + tsnet 端到端验证）

- mosh(blinksh/ios C++)+protobuf-lite 交叉编译为 MoshCore.xcframework
  （CommonCrypto 后端、含 arm64 模拟器 slice；绕 autotools 用 CMake 直编 + 手写 config.h）
- tsnet 桥新增 UDP relay（StartMoshRelay：loopback↔tsnet.Dial 逐包搬运）
- MoshSession（pipe↔FILE*/pthread/SIGWINCH）+ MoshConnectScanner（TXCore，+4 单测=39）
- SSHTerminalModel 编排：SSH 引导 mosh-server→解析 MOSH CONNECT→relay→mosh 接管
- LAN 直连 + mosh-over-tsnet 均端到端验证通过，R1(tsnet UDP 数据报语义) 证伪

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

vendor/protobuf/examples/ListPeople.java

@@ -0,0 +1,53 @@
+// See README.txt for information and build instructions.
+
+import com.example.tutorial.protos.AddressBook;
+import com.example.tutorial.protos.Person;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.PrintStream;
+
+class ListPeople {
+  // Iterates though all people in the AddressBook and prints info about them.
+  static void Print(AddressBook addressBook) {
+    for (Person person: addressBook.getPeopleList()) {
+      System.out.println("Person ID: " + person.getId());
+      System.out.println("  Name: " + person.getName());
+      if (!person.getEmail().isEmpty()) {
+        System.out.println("  E-mail address: " + person.getEmail());
+      }
+
+      for (Person.PhoneNumber phoneNumber : person.getPhonesList()) {
+        switch (phoneNumber.getType()) {
+          case MOBILE:
+            System.out.print("  Mobile phone #: ");
+            break;
+          case HOME:
+            System.out.print("  Home phone #: ");
+            break;
+          case WORK:
+            System.out.print("  Work phone #: ");
+            break;
+          default:
+            System.out.println(" Unknown phone #: ");
+            break;
+        }
+        System.out.println(phoneNumber.getNumber());
+      }
+    }
+  }
+
+  // Main function:  Reads the entire address book from a file and prints all
+  //   the information inside.
+  public static void main(String[] args) throws Exception {
+    if (args.length != 1) {
+      System.err.println("Usage:  ListPeople ADDRESS_BOOK_FILE");
+      System.exit(-1);
+    }
+
+    // Read the existing address book.
+    AddressBook addressBook =
+      AddressBook.parseFrom(new FileInputStream(args[0]));
+
+    Print(addressBook);
+  }
+}