Port more content to website-next (#1435)

Summary:
This builds upon https://github.com/facebook/yoga/pull/1433 and starts porting over and fixing some of the code in website-next.

1. Create a hero similar to current https://yogalayout.com hero
2. Start moving from `antd` and harcoded colors to [Infima](https://infima.dev/docs/getting-started/introduction/) primitives provided by Docusaurus
3. Replaced some more stock docusaurus assets, links, and text with the ones for Yoga.

There is still a lot to do here (not the least, adding real content), but it's beginning to look like a website, and is already pretty snappy. Eventually I want to get SSR working correctly with Playground, which is still a little broken in the port.

Pull Request resolved: https://github.com/facebook/yoga/pull/1435

Test Plan:
**Gatsby Original**
<img width="1795" alt="image" src="https://github.com/facebook/yoga/assets/835219/7670d53a-00a8-4146-a100-e4a05dd77488">

**New (light mode)**
<img width="800" alt="image" src="https://github.com/facebook/yoga/assets/835219/ebe11d15-5f6f-445f-bcc8-9ec51ecfac62">

**New (dark mode)**
<img width="800" alt="image" src="https://github.com/facebook/yoga/assets/835219/ca44a492-46df-410a-8303-baec3029ec49">

Reviewed By: yungsters

Differential Revision: D50523462

Pulled By: NickGerleman

fbshipit-source-id: 61b4610104f695a4e38a7d4bb6a0c2488bd6f89e

website-next/docusaurus.config.js

@@ -0,0 +1,130 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+// @ts-check
+
+import {themes as prismThemes} from 'prism-react-renderer';
+
+/** @type {import('@docusaurus/types').Config} */
+export default {
+  title: 'Yoga',
+  tagline:
+    'Build flexible layouts on any platform with a highly optimized open source layout engine designed with speed, size, and ease of use in mind.',
+  favicon: 'img/favicon.png',
+
+  url: 'https:/yogalayout.com',
+  baseUrl: '/',
+
+  organizationName: 'facebook',
+  projectName: 'yoga',
+
+  onBrokenLinks: 'throw',
+  onBrokenMarkdownLinks: 'warn',
+
+  i18n: {
+    defaultLocale: 'en',
+    locales: ['en'],
+  },
+
+  presets: [
+    [
+      'classic',
+      /** @type {import('@docusaurus/preset-classic').Options} */
+      ({
+        docs: {
+          sidebarPath: require.resolve('./sidebars.cjs'),
+          editUrl: 'https://github.com/facebook/yoga/tree/main/website',
+        },
+        blog: {
+          showReadingTime: true,
+          editUrl: 'https://github.com/facebook/yoga/tree/main/website',
+        },
+        theme: {
+          customCss: require.resolve('./src/css/custom.css'),
+        },
+      }),
+    ],
+  ],
+
+  themeConfig:
+    /** @type {import('@docusaurus/preset-classic').ThemeConfig} */
+    ({
+      navbar: {
+        title: 'Yoga',
+        logo: {
+          alt: 'Yoga Logo',
+          src: 'img/logo.svg',
+        },
+        items: [
+          {
+            type: 'docSidebar',
+            sidebarId: 'docsSidebar',
+            position: 'left',
+            label: 'Documentation',
+          },
+          {to: '/blog', label: 'Blog', position: 'left'},
+          {
+            href: 'https://github.com/facebook/yoga',
+            label: 'GitHub',
+            position: 'right',
+          },
+        ],
+      },
+      footer: {
+        style: 'dark',
+        logo: {
+          alt: 'Meta Open Source',
+          src: 'img/meta_oss.svg',
+          href: 'https://opensource.fb.com',
+          width: 300,
+          height: 64,
+        },
+        links: [
+          {
+            title: 'Docs',
+            items: [
+              {
+                label: 'Tutorial',
+                to: '/docs/intro',
+              },
+            ],
+          },
+          {
+            title: 'Community',
+            items: [
+              {
+                label: 'Stack Overflow',
+                href: 'https://stackoverflow.com/questions/tagged/yoga',
+              },
+              {
+                label: 'Twitter',
+                href: 'https://twitter.com/yogalayout',
+              },
+            ],
+          },
+          {
+            title: 'More',
+            items: [
+              {
+                label: 'Blog',
+                to: '/blog',
+              },
+              {
+                label: 'GitHub',
+                href: 'https://github.com/facebook/yoga',
+              },
+            ],
+          },
+        ],
+        copyright: `Copyright © ${new Date().getFullYear()} Meta Platforms, Inc.`,
+      },
+      prism: {
+        theme: prismThemes.github,
+        darkTheme: prismThemes.dracula,
+      },
+    }),
+};