project restructuring and initial refactoring

renderer/components/+404/index.ts

@@ -0,0 +1 @@
+export * from "./not-found"

renderer/components/+404/not-found.tsx

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+import React from "react";
+import { Trans } from "@lingui/macro";
+import { MainLayout } from "../layout/main-layout";
+
+export class NotFound extends React.Component {
+  render() {
+    return (
+      <MainLayout className="NotFound" contentClass="flex" footer={null}>
+        <p className="box center">
+          <Trans>Page not found</Trans>
+        </p>
+      </MainLayout>
+    )
+  }
+}