Upgrade react-admin to version 5 (#40)

* wip on ra upgrade

* Finish upgrade

* fix package.json

* pr fixes

* more pr fixes

* update readme

src/i18n/zh.ts

@@ -4,6 +4,14 @@ import { SynapseTranslationMessages } from ".";
 
 const zh: SynapseTranslationMessages = {
   ...chineseMessages,
+  ra: {
+    ...chineseMessages.ra,
+    navigation: {
+      ...chineseMessages.ra.navigation,
+      no_filtered_results: "没有结果",
+      clear_filters: "清除所有过滤器",
+    },
+  },
   synapseadmin: {
     auth: {
       base_url: "服务器 URL",