Migrate server to ESM

Sorry for the very big commit that may lead to git log issues and merge
conflicts, but it's a major step forward:

 * Server can be faster at startup because imports() are async and we can
   easily lazy import big modules
 * Angular doesn't seem to support ES import (with .js extension), so we
   had to correctly organize peertube into a monorepo:
    * Use yarn workspace feature
    * Use typescript reference projects for dependencies
    * Shared projects have been moved into "packages", each one is now a
      node module (with a dedicated package.json/tsconfig.json)
    * server/tools have been moved into apps/ and is now a dedicated app
      bundled and published on NPM so users don't have to build peertube
      cli tools manually
    * server/tests have been moved into packages/ so we don't compile
      them every time we want to run the server
 * Use isolatedModule option:
   * Had to move from const enum to const
     (https://www.typescriptlang.org/docs/handbook/enums.html#objects-vs-enums)
   * Had to explictely specify "type" imports when used in decorators
 * Prefer tsx (that uses esbuild under the hood) instead of ts-node to
   load typescript files (tests with mocha or scripts):
     * To reduce test complexity as esbuild doesn't support decorator
       metadata, we only test server files that do not import server
       models
     * We still build tests files into js files for a faster CI
 * Remove unmaintained peertube CLI import script
 * Removed some barrels to speed up execution (less imports)

packages/models/src/server/custom-config.model.ts

@@ -0,0 +1,259 @@
+import { NSFWPolicyType } from '../videos/nsfw-policy.type.js'
+import { BroadcastMessageLevel } from './broadcast-message-level.type.js'
+
+export type ConfigResolutions = {
+  '144p': boolean
+  '240p': boolean
+  '360p': boolean
+  '480p': boolean
+  '720p': boolean
+  '1080p': boolean
+  '1440p': boolean
+  '2160p': boolean
+}
+
+export interface CustomConfig {
+  instance: {
+    name: string
+    shortDescription: string
+    description: string
+    terms: string
+    codeOfConduct: string
+
+    creationReason: string
+    moderationInformation: string
+    administrator: string
+    maintenanceLifetime: string
+    businessModel: string
+    hardwareInformation: string
+
+    languages: string[]
+    categories: number[]
+
+    isNSFW: boolean
+    defaultNSFWPolicy: NSFWPolicyType
+
+    defaultClientRoute: string
+
+    customizations: {
+      javascript?: string
+      css?: string
+    }
+  }
+
+  theme: {
+    default: string
+  }
+
+  services: {
+    twitter: {
+      username: string
+      whitelisted: boolean
+    }
+  }
+
+  client: {
+    videos: {
+      miniature: {
+        preferAuthorDisplayName: boolean
+      }
+    }
+
+    menu: {
+      login: {
+        redirectOnSingleExternalAuth: boolean
+      }
+    }
+  }
+
+  cache: {
+    previews: {
+      size: number
+    }
+
+    captions: {
+      size: number
+    }
+
+    torrents: {
+      size: number
+    }
+
+    storyboards: {
+      size: number
+    }
+  }
+
+  signup: {
+    enabled: boolean
+    limit: number
+    requiresApproval: boolean
+    requiresEmailVerification: boolean
+    minimumAge: number
+  }
+
+  admin: {
+    email: string
+  }
+
+  contactForm: {
+    enabled: boolean
+  }
+
+  user: {
+    history: {
+      videos: {
+        enabled: boolean
+      }
+    }
+    videoQuota: number
+    videoQuotaDaily: number
+  }
+
+  videoChannels: {
+    maxPerUser: number
+  }
+
+  transcoding: {
+    enabled: boolean
+
+    allowAdditionalExtensions: boolean
+    allowAudioFiles: boolean
+
+    remoteRunners: {
+      enabled: boolean
+    }
+
+    threads: number
+    concurrency: number
+
+    profile: string
+
+    resolutions: ConfigResolutions & { '0p': boolean }
+
+    alwaysTranscodeOriginalResolution: boolean
+
+    webVideos: {
+      enabled: boolean
+    }
+
+    hls: {
+      enabled: boolean
+    }
+  }
+
+  live: {
+    enabled: boolean
+
+    allowReplay: boolean
+
+    latencySetting: {
+      enabled: boolean
+    }
+
+    maxDuration: number
+    maxInstanceLives: number
+    maxUserLives: number
+
+    transcoding: {
+      enabled: boolean
+      remoteRunners: {
+        enabled: boolean
+      }
+      threads: number
+      profile: string
+      resolutions: ConfigResolutions
+      alwaysTranscodeOriginalResolution: boolean
+    }
+  }
+
+  videoStudio: {
+    enabled: boolean
+
+    remoteRunners: {
+      enabled: boolean
+    }
+  }
+
+  videoFile: {
+    update: {
+      enabled: boolean
+    }
+  }
+
+  import: {
+    videos: {
+      concurrency: number
+
+      http: {
+        enabled: boolean
+      }
+      torrent: {
+        enabled: boolean
+      }
+    }
+    videoChannelSynchronization: {
+      enabled: boolean
+      maxPerUser: number
+    }
+  }
+
+  trending: {
+    videos: {
+      algorithms: {
+        enabled: string[]
+        default: string
+      }
+    }
+  }
+
+  autoBlacklist: {
+    videos: {
+      ofUsers: {
+        enabled: boolean
+      }
+    }
+  }
+
+  followers: {
+    instance: {
+      enabled: boolean
+      manualApproval: boolean
+    }
+  }
+
+  followings: {
+    instance: {
+      autoFollowBack: {
+        enabled: boolean
+      }
+
+      autoFollowIndex: {
+        enabled: boolean
+        indexUrl: string
+      }
+    }
+  }
+
+  broadcastMessage: {
+    enabled: boolean
+    message: string
+    level: BroadcastMessageLevel
+    dismissable: boolean
+  }
+
+  search: {
+    remoteUri: {
+      users: boolean
+      anonymous: boolean
+    }
+
+    searchIndex: {
+      enabled: boolean
+      url: string
+      disableLocalSearch: boolean
+      isDefaultSearch: boolean
+    }
+  }
+
+}