Add signup page

Author: NorbertLoh

frontend/peerprep/app/pages/signup.tsx

@@ -0,0 +1,81 @@
+import { Grid, TextInput, Button, PasswordInput, Divider, Text, Image } from "@mantine/core";
+import { useForm } from "@mantine/form";
+import { Link } from "react-router";
+import logo from "../assets/images/logo.svg";
+
+export function meta() {
+  return [
+    { title: "PeerPrep - Signup" },
+    { name: "description", content: "Welcome to PeerPrep!" },
+  ];
+}
+
+export default function Signup() {
+  const form = useForm({
+    initialValues: {
+      email: "",
+      username: "",
+      password: "",
+    },
+
+    validate: {
+      email: (value) => (/^\S+@\S+$/.test(value) ? null : "Invalid email"),
+      password: (value) =>
+        value.length < 6 ? "Password must be at least 6 characters" : null,
+    },
+  });
+
+  return (
+    <Grid>
+      <Grid.Col span={12}>
+        <Grid justify="center" gutter={"xs"} mt={{ base: 20, md: 200 }}>
+          <Grid.Col span={{ base: 12, md: 4 }}>
+            <Image src={logo} alt="PeerPrep Logo" />
+            <form onSubmit={form.onSubmit((values) => console.log(values))}>
+              <Grid.Col span={12}>
+                <TextInput
+                  label="Email"
+                  placeholder="Enter your email"
+                  type="email"
+                  key={form.key("email")}
+                  {...form.getInputProps('email')}
+                  error={undefined}
+                />
+              </Grid.Col>
+              <Grid.Col span={12}>
+                <TextInput
+                  label="Username"
+                  placeholder="Enter your Username"
+                  type="text"
+                  key={form.key("username")}
+                  {...form.getInputProps('username')}
+                  error={undefined}
+                />
+              </Grid.Col>
+              <Grid.Col span={12}>
+                <PasswordInput
+                  label="Password"
+                  placeholder="Enter your password"
+                  type="password"
+                  key={form.key("password")}
+                  {...form.getInputProps('password')}
+                />
+              </Grid.Col>
+              <Grid.Col span={12} mt="md">
+                <Button type="submit" fullWidth autoContrast>
+                  Login
+                </Button>
+              </Grid.Col>
+            </form>
+            <Grid.Col span={12} mt="md">
+              <Divider my="xs" />
+            </Grid.Col>
+            <Grid.Col span={12} mt="md" className="text-center">
+              <Text span>Already have an account? </Text><Link to="/login"><Text span td="underline" c="blue" className="cursor-pointer">Log in!</Text></Link>
+            </Grid.Col>
+          </Grid.Col>
+        </Grid>
+      </Grid.Col>
+    </Grid>
+  );
+}