build(deps): add react-router-dom

Install react-router-dom to support client-side navigation. This is a prerequisite for implementing the multi-step authentication flow and other routed features.

Additionally, this commit includes minor copy improvements to the password reset forms for better clarity.

node_modules/react-dom/static.edge.js

@@ -0,0 +1,12 @@
+'use strict';
+
+var s;
+if (process.env.NODE_ENV === 'production') {
+  s = require('./cjs/react-dom-server.edge.production.js');
+} else {
+  s = require('./cjs/react-dom-server.edge.development.js');
+}
+
+exports.version = s.version;
+exports.prerender = s.prerender;
+exports.resumeAndPrerender = s.resumeAndPrerender;