Docs/move-english-docs-to-"en"-folder (#2268)

* Move english pages under `/en` and fix broken links hopefully

* Add meta refresh tags for `/` to `/en/` url moves + make `/index.astro` work without js

* update languageselect for new en format

Co-authored-by: Fred K. Schott <fkschott@gmail.com>

1 files changed, 70 insertions, 0 deletions

diff --git a/docs/src/pages/en/reference/builtin-components.md b/docs/src/pages/en/reference/builtin-components.md
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index 000000000..b2d8c4295
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+---
+layout: ~/layouts/MainLayout.astro
+title: Built-In Components
+---
+
+Astro includes several builtin components for you to use in your projects. All builtin components are available via `import {} from 'astro/components';`.
+
+## `<Code />`
+
+```astro
+---
+import { Code } from 'astro/components';
+---
+<!-- Syntax highlight some JavaScript code. -->
+<Code code={`const foo = 'bar';`} lang="js" />
+<!-- Optional: customize your theme. -->
+<Code code={`const foo = 'bar';`} lang="js" theme="dark-plus" />
+<!-- Optional: Enable word wrapping. -->
+<Code code={`const foo = 'bar';`} lang="js" wrap />
+```
+
+This component provides syntax highlighting for code blocks at build time (no client-side JavaScript included). The component is powered internally by shiki and it supports all popular [themes](https://github.com/shikijs/shiki/blob/main/docs/themes.md) and [languages](https://github.com/shikijs/shiki/blob/main/docs/languages.md).
+
+You can also use the `<Prism />` component for syntax highlighting powered by the [Prism](https://prismjs.com/) syntax highlighting library. This is the library that Astro's Markdown uses by default. However, we will be transitioning all usage over to `<Code>` as we move towards our v1.0 release.
+
+## `<Markdown />`
+
+```astro
+---
+import { Markdown } from 'astro/components';
+---
+<Markdown>
+  # Markdown syntax is now supported! **Yay!**
+</Markdown>
+```
+
+See our [Markdown Guide](/en/guides/markdown-content) for more info.
+
+<!-- TODO: We should move some of the specific component info here. -->
+
+## `<Prism />`
+
+```astro
+---
+import { Prism } from 'astro/components';
+---
+<Prism lang="js" code={`const foo = 'bar';`} />
+```
+
+This component provides language-specific syntax highlighting for code blocks. Since this never changes in the client it makes sense to use an Astro component (it's equally reasonable to use a framework component for this kind of thing; Astro is server-only by default for all frameworks!).
+
+See the [list of languages supported by Prism](https://prismjs.com/#supported-languages) where you can find a language's corresponding alias. And, you can also display your Astro code blocks with lang="astro"!
+
+## `<Debug />`
+
+```astro
+---
+import Debug from 'astro/debug';
+const serverObject = {
+  a: 0,
+  b: "string",
+  c: {
+    nested: "object"
+  }
+}
+---
+<Debug {serverObject} />
+```
+
+This component provides a way to inspect values on the clientside, without any JavaScript.