Add WeChat template message handling

Add support for WeChat template messages in the `yudao-module-mp` module.

* **pom.xml**
  - Uncomment the `yudao-module-mp` module to include it in the build process.

* **MpTemplateMessageService.java**
  - Define the `MpTemplateMessageService` interface.
  - Add a method to send template messages.

* **MpTemplateMessageServiceImpl.java**
  - Implement the `MpTemplateMessageService` interface.
  - Add logic to send template messages using the WeChat API.

* **TemplateMessageHandler.java**
  - Define the `TemplateMessageHandler` class.
  - Implement the `WxMpMessageHandler` interface.
  - Add logic to handle incoming template messages.

* **README.md**
  - Add a section about the new template message handling feature.
  - Include usage instructions and examples.

---

For more details, open the [Copilot Workspace session](https://copilot-workspace.githubnext.com/YunaiV/ruoyi-vue-pro?shareId=XXXX-XXXX-XXXX-XXXX).

yudao-module-mp/yudao-module-mp-biz/src/main/java/cn/iocoder/yudao/module/mp/service/handler/message/TemplateMessageHandler.java

@@ -0,0 +1,35 @@
+package cn.iocoder.yudao.module.mp.service.handler.message;
+
+import cn.iocoder.yudao.module.mp.framework.mp.core.context.MpContextHolder;
+import cn.iocoder.yudao.module.mp.service.message.MpTemplateMessageService;
+import lombok.extern.slf4j.Slf4j;
+import me.chanjar.weixin.common.session.WxSessionManager;
+import me.chanjar.weixin.mp.api.WxMpMessageHandler;
+import me.chanjar.weixin.mp.api.WxMpService;
+import me.chanjar.weixin.mp.bean.message.WxMpXmlMessage;
+import me.chanjar.weixin.mp.bean.message.WxMpXmlOutMessage;
+import org.springframework.stereotype.Component;
+
+import jakarta.annotation.Resource;
+import java.util.Map;
+
+/**
+ * 模板消息的事件处理器
+ */
+@Component
+@Slf4j
+public class TemplateMessageHandler implements WxMpMessageHandler {
+
+    @Resource
+    private MpTemplateMessageService mpTemplateMessageService;
+
+    @Override
+    public WxMpXmlOutMessage handle(WxMpXmlMessage wxMessage, Map<String, Object> context,
+                                    WxMpService wxMpService, WxSessionManager sessionManager) {
+        log.info("[handle][接收到模板消息，内容：{}]", wxMessage);
+        // 处理模板消息的逻辑
+        mpTemplateMessageService.sendTemplateMessage(MpContextHolder.getAppId(), wxMessage);
+        return null;
+    }
+
+}

yudao-module-mp/yudao-module-mp-biz/src/main/java/cn/iocoder/yudao/module/mp/service/message/MpTemplateMessageService.java

@@ -0,0 +1,17 @@
+package cn.iocoder.yudao.module.mp.service.message;
+
+import me.chanjar.weixin.mp.bean.template.WxMpTemplateMessage;
+
+/**
+ * 公众号模板消息 Service 接口
+ */
+public interface MpTemplateMessageService {
+
+    /**
+     * 发送模板消息
+     *
+     * @param templateMessage 模板消息
+     */
+    void sendTemplateMessage(WxMpTemplateMessage templateMessage);
+
+}

yudao-module-mp/yudao-module-mp-biz/src/main/java/cn/iocoder/yudao/module/mp/service/message/MpTemplateMessageServiceImpl.java

@@ -0,0 +1,32 @@
+package cn.iocoder.yudao.module.mp.service.message;
+
+import cn.iocoder.yudao.module.mp.framework.mp.core.MpServiceFactory;
+import lombok.extern.slf4j.Slf4j;
+import me.chanjar.weixin.common.error.WxErrorException;
+import me.chanjar.weixin.mp.api.WxMpService;
+import me.chanjar.weixin.mp.bean.template.WxMpTemplateMessage;
+import org.springframework.stereotype.Service;
+import org.springframework.validation.annotation.Validated;
+
+import jakarta.annotation.Resource;
+
+@Service
+@Validated
+@Slf4j
+public class MpTemplateMessageServiceImpl implements MpTemplateMessageService {
+
+    @Resource
+    private MpServiceFactory mpServiceFactory;
+
+    @Override
+    public void sendTemplateMessage(WxMpTemplateMessage templateMessage) {
+        WxMpService mpService = mpServiceFactory.getRequiredMpService(templateMessage.getAppid());
+        try {
+            mpService.getTemplateMsgService().sendTemplateMsg(templateMessage);
+        } catch (WxErrorException e) {
+            log.error("[sendTemplateMessage][发送模板消息失败，templateMessage={}]", templateMessage, e);
+            throw new RuntimeException("发送模板消息失败", e);
+        }
+    }
+
+}