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)

server/server/lib/paths.ts

@@ -0,0 +1,92 @@
+import { join } from 'path'
+import { CONFIG } from '@server/initializers/config.js'
+import { DIRECTORIES, VIDEO_LIVE } from '@server/initializers/constants.js'
+import { isStreamingPlaylist, MStreamingPlaylistVideo, MVideo, MVideoFile, MVideoUUID } from '@server/types/models/index.js'
+import { removeFragmentedMP4Ext } from '@peertube/peertube-core-utils'
+import { buildUUID } from '@peertube/peertube-node-utils'
+import { isVideoInPrivateDirectory } from './video-privacy.js'
+
+// ################## Video file name ##################
+
+function generateWebVideoFilename (resolution: number, extname: string) {
+  return buildUUID() + '-' + resolution + extname
+}
+
+function generateHLSVideoFilename (resolution: number) {
+  return `${buildUUID()}-${resolution}-fragmented.mp4`
+}
+
+// ################## Streaming playlist ##################
+
+function getLiveDirectory (video: MVideo) {
+  return getHLSDirectory(video)
+}
+
+function getLiveReplayBaseDirectory (video: MVideo) {
+  return join(getLiveDirectory(video), VIDEO_LIVE.REPLAY_DIRECTORY)
+}
+
+function getHLSDirectory (video: MVideo) {
+  if (isVideoInPrivateDirectory(video.privacy)) {
+    return join(DIRECTORIES.HLS_STREAMING_PLAYLIST.PRIVATE, video.uuid)
+  }
+
+  return join(DIRECTORIES.HLS_STREAMING_PLAYLIST.PUBLIC, video.uuid)
+}
+
+function getHLSRedundancyDirectory (video: MVideoUUID) {
+  return join(DIRECTORIES.HLS_REDUNDANCY, video.uuid)
+}
+
+function getHlsResolutionPlaylistFilename (videoFilename: string) {
+  // Video file name already contain resolution
+  return removeFragmentedMP4Ext(videoFilename) + '.m3u8'
+}
+
+function generateHLSMasterPlaylistFilename (isLive = false) {
+  if (isLive) return 'master.m3u8'
+
+  return buildUUID() + '-master.m3u8'
+}
+
+function generateHlsSha256SegmentsFilename (isLive = false) {
+  if (isLive) return 'segments-sha256.json'
+
+  return buildUUID() + '-segments-sha256.json'
+}
+
+// ################## Torrents ##################
+
+function generateTorrentFileName (videoOrPlaylist: MVideo | MStreamingPlaylistVideo, resolution: number) {
+  const extension = '.torrent'
+  const uuid = buildUUID()
+
+  if (isStreamingPlaylist(videoOrPlaylist)) {
+    return `${uuid}-${resolution}-${videoOrPlaylist.getStringType()}${extension}`
+  }
+
+  return uuid + '-' + resolution + extension
+}
+
+function getFSTorrentFilePath (videoFile: MVideoFile) {
+  return join(CONFIG.STORAGE.TORRENTS_DIR, videoFile.torrentFilename)
+}
+
+// ---------------------------------------------------------------------------
+
+export {
+  generateHLSVideoFilename,
+  generateWebVideoFilename,
+
+  generateTorrentFileName,
+  getFSTorrentFilePath,
+
+  getHLSDirectory,
+  getLiveDirectory,
+  getLiveReplayBaseDirectory,
+  getHLSRedundancyDirectory,
+
+  generateHLSMasterPlaylistFilename,
+  generateHlsSha256SegmentsFilename,
+  getHlsResolutionPlaylistFilename
+}