feat: 1.move sample_frames from image_processor. 2.support diffenrent types in chat_template content.

Author: xanecdotex

xllm/core/framework/chat_template/jinja_chat_template.cpp

@@ -147,6 +147,13 @@ nlohmann::ordered_json JinjaChatTemplate::get_mm_content(
       item_json["text"] = item.text;
     } else if (item.type == "video_url") {
       item_json["video"] = "mm place holder";
+      item_json["video_url"] = "mm place holder";
+    } else if (item.type == "image_url") {
+      item_json["image"] = "mm place holder";
+      item_json["image_url"] = "mm place holder";
+    } else if (item.type == "audio_url") {
+      item_json["audio"] = "mm place holder";
+      item_json["audio_url"] = "mm place holder";
     } else {
       item_json[item.type] = "mm place holder";
     }