initializes the base for the firmware wizard

PWA based on ReactJs. Showcases the basic functionalities required
for the Firmware Selector.
Proof of Concept for the wizard with selection for vendor, model
and variants.

Signed-off-by: Sudhanshu Gautam <me@sudhanshug.com>
Initial commit from Create React App

src/components/header.js

@@ -0,0 +1,25 @@
+import React from "react";
+import AppBar from '@material-ui/core/AppBar';
+import Typography from '@material-ui/core/Typography';
+import Button from '@material-ui/core/Button';
+import LanguageIcon from '@material-ui/icons/Language';
+import { Toolbar } from '@material-ui/core';
+
+class Header extends React.Component {
+  render() {
+    return (
+      <AppBar position="static">
+        <Toolbar>
+          <Typography edge="start" variant="h6">OpenWrt Firmware Selector Wizard</Typography>
+          <div style={{flexGrow: 1}}></div>
+          <Button color="secondary"  variant="contained">
+            Change Language &nbsp;
+            <LanguageIcon />
+          </Button>
+        </Toolbar>
+      </AppBar>
+    );
+  }
+}
+
+export default Header;