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)

2 files changed, 2 insertions, 3 deletions

diff --git a/client/src/app/+signup/+register/register.component.ts b/client/src/app/+signup/+register/register.component.ts
index be51c36d1..396971d98 100644
--- a/client/src/app/+signup/+register/register.component.ts
+++ b/client/src/app/+signup/+register/register.component.ts
@@ -5,8 +5,7 @@ import { ActivatedRoute } from '@angular/router'
 import { AuthService } from '@app/core'
 import { HooksService } from '@app/core/plugins/hooks.service'
 import { InstanceAboutAccordionComponent } from '@app/shared/shared-instance'
-import { UserRegister } from '@shared/models'
-import { ServerConfig } from '@shared/models/server'
+import { ServerConfig, UserRegister } from '@peertube/peertube-models'
 import { SignupService } from '../shared/signup.service'
 
 @Component({
diff --git a/client/src/app/+signup/shared/signup.service.ts b/client/src/app/+signup/shared/signup.service.ts
index f647298be..7c331437e 100644
--- a/client/src/app/+signup/shared/signup.service.ts
+++ b/client/src/app/+signup/shared/signup.service.ts
@@ -2,7 +2,7 @@ import { catchError, tap } from 'rxjs/operators'
 import { HttpClient } from '@angular/common/http'
 import { Injectable } from '@angular/core'
 import { RestExtractor, UserService } from '@app/core'
-import { UserRegister, UserRegistrationRequest } from '@shared/models'
+import { UserRegister, UserRegistrationRequest } from '@peertube/peertube-models'
 
 @Injectable()
 export class SignupService {