Add robots.txt and Prisma syntax highlighting. (#5758)

* add robots.txt. Resolves DA-37

* add syntax highlighting for Prisma files. Resolves DA-144

src/theme/prism-include-languages.ts

@@ -0,0 +1,32 @@
+import siteConfig from '@generated/docusaurus.config'
+import type * as PrismNamespace from 'prismjs'
+import type { Optional } from 'utility-types'
+
+export default function prismIncludeLanguages(PrismObject: typeof PrismNamespace): void {
+  const {
+    themeConfig: { prism },
+  } = siteConfig
+  const { additionalLanguages } = prism as { additionalLanguages: string[] }
+
+  // Prism components work on the Prism instance on the window, while prism-
+  // react-renderer uses its own Prism instance. We temporarily mount the
+  // instance onto window, import components to enhance it, then remove it to
+  // avoid polluting global namespace.
+  // You can mutate PrismObject: registering plugins, deleting languages... As
+  // long as you don't re-assign it
+  globalThis.Prism = PrismObject
+
+  additionalLanguages.forEach((lang) => {
+    if (lang === 'php') {
+      // eslint-disable-next-line global-require
+      require('prismjs/components/prism-markup-templating.js')
+    }
+    // eslint-disable-next-line global-require, import/no-dynamic-require
+    require(`prismjs/components/prism-${lang}`)
+  })
+
+  require('@site/src/theme/prism-prisma.js')
+
+  // @ts-ignore
+  delete (globalThis as Optional<typeof globalThis, 'Prism'>).Prism
+}

src/theme/prism-prisma.js

@@ -0,0 +1,25 @@
+Prism.languages.prisma = Prism.languages.extend('clike', {
+    keyword: /\b(?:datasource|enum|generator|model|type|view)\b/,
+    'type-class-name': /(\s+)[A-Z]\w+/, ///(\b)(\s+)[A-Z]\w+/
+})
+
+Prism.languages.javascript['class-name'][0].pattern =
+    /(\b(?:model|datasource|enum|generator|type|model|view)\s+)[\w.\\]+/
+
+Prism.languages.insertBefore('prisma', 'function', {
+    annotation: {
+        pattern: /(^|[^.])@+\w+/,
+        lookbehind: true,
+        alias: 'punctuation',
+    },
+})
+
+Prism.languages.insertBefore('prisma', 'punctuation', {
+    'type-args': /\b(?:references|fields|onDelete|onUpdate):/,
+})
+
+Prism.languages.insertBefore('prisma', 'type-class-name', {
+    'not-class': /\n(\s+)[A-Z]\w+/,
+})
+
+Prism.languages.json5 = Prism.languages.js

static/robots.txt

@@ -0,0 +1,6 @@
+User-agent: *
+Disallow: /
+Disallow: /*?query=*
+Disallow: /*?page=*
+Disallow: /*&query=*
+Disallow: /*&page=*