add THUDM/chatglm3-6b chat template test

Tests/ChatTemplateTests.swift

@@ -171,6 +171,14 @@ final class ChatTemplateTests: XCTestCase {
                 "messages": messagesWithSystem
             ],
             target: "<|im_start|>system\nYou are a friendly chatbot who always responds in the style of a pirate<|im_end|>\n<|im_start|>user\nHello, how are you?<|im_end|>\n<|im_start|>assistant\nI\'m doing great. How can I help you today?<|im_end|>\n<|im_start|>user\nI\'d like to show off how chat templating works!"
+        ),
+        // THUDM/chatglm3-6b
+        Test(
+            chatTemplate: "{% for message in messages %}{% if loop.first %}[gMASK]sop<|{{ message['role'] }}|>\n {{ message['content'] }}{% else %}<|{{ message['role'] }}|>\n {{ message['content'] }}{% endif %}{% endfor %}{% if add_generation_prompt %}<|assistant|>{% endif %}",
+            data: [
+                "messages": messagesWithSystem
+            ],
+            target: "[gMASK]sop<|system|>\n You are a friendly chatbot who always responds in the style of a pirate<|user|>\n Hello, how are you?<|assistant|>\n I\'m doing great. How can I help you today?<|user|>\n I\'d like to show off how chat templating works!"
         )
     ]