Convert all pages to Typescript

Convert all files in `client/src/pages` to Typescript

Gitlab: #30

Change-Id: I9b5ec5b042487d732bb7d46b584f797049eb068c
diff --git a/client/src/pages/ServerSetup.tsx b/client/src/pages/ServerSetup.tsx
new file mode 100644
index 0000000..dd414d3
--- /dev/null
+++ b/client/src/pages/ServerSetup.tsx
@@ -0,0 +1,72 @@
+import GroupAddRounded from '@mui/icons-material/GroupAddRounded';
+import { Box, Card, CardContent, Container, Fab, Input, Typography } from '@mui/material';
+import { FormEvent, useState } from 'react';
+
+import authManager from '../AuthManager';
+
+export default function ServerSetup() {
+  const [password, setPassword] = useState('');
+  const [passwordRepeat, setPasswordRepeat] = useState('');
+  const [loading, setLoading] = useState(false);
+
+  const isValid = () => password && password === passwordRepeat;
+
+  const handleSubmit = (e: FormEvent) => {
+    e.preventDefault();
+    setLoading(true);
+    if (!isValid()) return;
+    authManager.setup(password);
+  };
+
+  return (
+    <Container className="message-list">
+      <Card>
+        <CardContent component="form" onSubmit={handleSubmit}>
+          <Typography gutterBottom variant="h5" component="h2">
+            Jami Web Node setup
+          </Typography>
+          <Typography variant="body2" color="textSecondary" component="p">
+            Welcome to the Jami web node setup.
+            <br />
+            Let&apos;s start by creating a new administrator account to control access to the server configuration.
+          </Typography>
+
+          <Box style={{ textAlign: 'center', marginTop: 8, marginBottom: 16 }}>
+            <div>
+              <Input value="admin" name="username" autoComplete="username" disabled />
+            </div>
+            <div>
+              <Input
+                value={password}
+                onChange={(e) => setPassword(e.target.value)}
+                name="password"
+                type="password"
+                placeholder="New password"
+                autoComplete="new-password"
+                disabled={loading}
+              />
+            </div>
+            <div>
+              <Input
+                value={passwordRepeat}
+                onChange={(e) => setPasswordRepeat(e.target.value)}
+                name="password"
+                error={!!passwordRepeat && !isValid()}
+                type="password"
+                placeholder="Repeat password"
+                autoComplete="new-password"
+                disabled={loading}
+              />
+            </div>
+          </Box>
+          <Box style={{ textAlign: 'center', marginTop: 24 }}>
+            <Fab variant="extended" color="primary" type="submit" disabled={!isValid() || loading}>
+              <GroupAddRounded />
+              Create admin account
+            </Fab>
+          </Box>
+        </CardContent>
+      </Card>
+    </Container>
+  );
+}