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)

1 files changed, 18 insertions, 0 deletions

diff --git a/packages/tests/src/shared/plugins.ts b/packages/tests/src/shared/plugins.ts
new file mode 100644
index 000000000..c2afcbcbf
--- /dev/null
+++ b/packages/tests/src/shared/plugins.ts
@@ -0,0 +1,18 @@
+/* eslint-disable @typescript-eslint/no-unused-expressions,@typescript-eslint/require-await */
+
+import { expect } from 'chai'
+import { PeerTubeServer } from '@peertube/peertube-server-commands'
+
+async function testHelloWorldRegisteredSettings (server: PeerTubeServer) {
+  const body = await server.plugins.getRegisteredSettings({ npmName: 'peertube-plugin-hello-world' })
+
+  const registeredSettings = body.registeredSettings
+  expect(registeredSettings).to.have.length.at.least(1)
+
+  const adminNameSettings = registeredSettings.find(s => s.name === 'admin-name')
+  expect(adminNameSettings).to.not.be.undefined
+}
+
+export {
+  testHelloWorldRegisteredSettings
+}