Sort imports from all files

Add "prettier" script in `package.json` to check if all files are
compliant.

Sort all imports and format all files by running `npm run lint -- --fix`
followed by `npm run prettier -- --write`.

Gitlab #29

Change-Id: Id80402d1344c3bc611f66a46cffeee5f2c375bd8
diff --git a/client/src/pages/jamiAccountCreation.jsx b/client/src/pages/jamiAccountCreation.jsx
index 8d47b48..fbff909 100644
--- a/client/src/pages/jamiAccountCreation.jsx
+++ b/client/src/pages/jamiAccountCreation.jsx
@@ -1,10 +1,11 @@
-import { useState } from 'react';
-import { Container, Card, CardContent, Typography, Fab, CardActions, Box } from '@mui/material';
 import { AddRounded } from '@mui/icons-material';
-import UsernameChooser from '../components/UsernameChooser';
-import authManager from '../AuthManager';
+import { Box, Card, CardActions, CardContent, Container, Fab, Typography } from '@mui/material';
+import { useState } from 'react';
 import { useNavigate } from 'react-router';
 
+import authManager from '../AuthManager';
+import UsernameChooser from '../components/UsernameChooser';
+
 export default function JamiAccountDialog(props) {
   const [name, setName] = useState('');
   const [loading, setLoading] = useState(false);