* Create TextMessage.java

* Create DingTalkUtils.java

* Update alert.properties

* Update Constants.java

* Update Constants.java

* Create DingTalkMsgFormatter.java

* Update alert.properties

* Create DingTalkMsgFormatterTest.java

* Create DingTalkUtilsTest.java

* Update DingTalkUtils.java

* Create DingTalkManager.java

* Update EmailAlertPlugin.java

* feature: test send msg with proxy

* fix:delete comment and add exception info

* Update DingTalkUtilsTest.java

* Update DingTalkUtils.java

* Update DingTalkManager.java

* Update EmailAlertPlugin.java

* Update DingTalkUtilsTest.java

* Update DingTalkMsgFormatter.java

* Update DingTalkUtils.java

* Update DingTalkMsgFormatterTest.java

* Update DingTalkUtilsTest.java

* Update TextMessage.java

* Update DingTalkManager.java

* Delete TextMessage.java

* fix: add test case

* fix:add http client test case

* fix:delete ignore test case

* Update pom.xml
Co-authored-by: Ndailidong <dailidong66@gmail.com>