feat: fetch conversation and delete chat dialog (#69)

* feat: set chat configuration to backend

* feat: exclude unEnabled variables

* feat: delete chat dialog

* feat: fetch conversation

web/src/pages/chat/chat-container/index.less

@@ -1,3 +1,18 @@
 .chatContainer {
   padding: 0 24px 24px;
 }
+
+.messageItem {
+  .messageItemContent {
+    display: inline-block;
+    width: 300px;
+  }
+}
+
+.messageItemLeft {
+  text-align: left;
+}
+
+.messageItemRight {
+  text-align: right;
+}