[material-ui] Replace the Album template with a landing page (#37557)

Co-authored-by: Diego Andai <diego@mui.com>
Co-authored-by: Danilo Leal <67129314+danilo-leal@users.noreply.github.com>
Co-authored-by: siriwatknp <siriwatkunaporn@gmail.com>

docs/data/material/getting-started/templates/landing-page/LandingPage.js

@@ -0,0 +1,108 @@
+import * as React from 'react';
+import PropTypes from 'prop-types';
+
+import CssBaseline from '@mui/material/CssBaseline';
+import Box from '@mui/material/Box';
+import Divider from '@mui/material/Divider';
+import { ThemeProvider, createTheme } from '@mui/material/styles';
+import ToggleButton from '@mui/material/ToggleButton';
+import ToggleButtonGroup from '@mui/material/ToggleButtonGroup';
+import AutoAwesomeRoundedIcon from '@mui/icons-material/AutoAwesomeRounded';
+import SvgMaterialDesign from 'docs/src/icons/SvgMaterialDesign';
+import AppAppBar from './components/AppAppBar';
+import Hero from './components/Hero';
+import LogoCollection from './components/LogoCollection';
+import Highlights from './components/Highlights';
+import Pricing from './components/Pricing';
+import Features from './components/Features';
+import Testimonials from './components/Testimonials';
+import FAQ from './components/FAQ';
+import Footer from './components/Footer';
+import getLPTheme from './getLPTheme';
+
+const defaultTheme = createTheme({});
+
+function ToggleCustomTheme({ showCustomTheme, toggleCustomTheme }) {
+  return (
+    <Box
+      sx={{
+        display: 'flex',
+        flexDirection: 'column',
+        alignItems: 'center',
+        width: '100dvw',
+        position: 'fixed',
+        bottom: 24,
+      }}
+    >
+      <ToggleButtonGroup
+        color="primary"
+        exclusive
+        value={showCustomTheme}
+        onChange={toggleCustomTheme}
+        aria-label="Platform"
+        sx={{
+          backgroundColor: 'background.default',
+          '& .Mui-selected': {
+            pointerEvents: 'none',
+          },
+        }}
+      >
+        <ToggleButton value>
+          <AutoAwesomeRoundedIcon sx={{ fontSize: '20px', mr: 1 }} />
+          Custom theme
+        </ToggleButton>
+        <ToggleButton value={false}>
+          <SvgMaterialDesign sx={{ fontSize: '20px', mr: 1 }} />
+          Material Design
+        </ToggleButton>
+      </ToggleButtonGroup>
+    </Box>
+  );
+}
+
+ToggleCustomTheme.propTypes = {
+  showCustomTheme: PropTypes.shape({
+    valueOf: PropTypes.func.isRequired,
+  }).isRequired,
+  toggleCustomTheme: PropTypes.func.isRequired,
+};
+
+export default function LandingPage() {
+  const [mode, setMode] = React.useState('dark');
+  const [showCustomTheme, setShowCustomTheme] = React.useState(true);
+  const LPtheme = createTheme(getLPTheme(mode));
+
+  const toggleColorMode = () => {
+    setMode((prev) => (prev === 'dark' ? 'light' : 'dark'));
+  };
+
+  const toggleCustomTheme = () => {
+    setShowCustomTheme((prev) => !prev);
+  };
+
+  return (
+    <ThemeProvider theme={showCustomTheme ? LPtheme : defaultTheme}>
+      <CssBaseline />
+      <AppAppBar mode={mode} toggleColorMode={toggleColorMode} />
+      <Hero />
+      <Box sx={{ bgcolor: 'background.default' }}>
+        <LogoCollection />
+        <Features />
+        <Divider />
+        <Testimonials />
+        <Divider />
+        <Highlights />
+        <Divider />
+        <Pricing />
+        <Divider />
+        <FAQ />
+        <Divider />
+        <Footer />
+      </Box>
+      <ToggleCustomTheme
+        showCustomTheme={showCustomTheme}
+        toggleCustomTheme={toggleCustomTheme}
+      />
+    </ThemeProvider>
+  );
+}