Port next.js to TypeScript (#51438)

src/types.ts

@@ -1,4 +1,5 @@
 import type { Request } from 'express'
+import type { Failbot } from '@github/failbot'
 
 import type enterpriseServerReleases from '@/versions/lib/enterprise-server-releases.d.ts'
 
@@ -11,7 +12,7 @@ export type ExtendedRequest = Request & {
   context?: Context
   language?: string
   userLanguage?: string
-  // Add more properties here as needed
+  FailBot?: Failbot
 }
 
 // TODO: Make this type from inference using AJV based on the schema.
@@ -164,6 +165,8 @@ export type Context = Features & {
   productGroups?: ProductGroup[]
   featuredLinks?: FeaturedLinksExpanded
   currentLearningTrack?: LearningTrack | null
+  renderedPage?: string
+  miniTocItems?: string | undefined
 }
 export type LearningTracks = {
   [group: string]: {
@@ -349,6 +352,10 @@ export type Page = {
   autogenerated?: string
   featuredLinks?: FeaturedLinksExpanded
   redirect_from?: string[]
+  showMiniToc?: boolean
+  effectiveDate?: string
+  fullTitle?: string
+  render: (context: Context) => Promise<string>
 }
 
 type ChangeLog = {