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, 13 insertions, 10 deletions

diff --git a/.eslintrc.json b/.eslintrc.json
index 4e80ff224..3bfdee6eb 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -1,5 +1,6 @@
 {
   "extends": "standard-with-typescript",
+  "root": true,
   "rules": {
     "eol-last": [
       "error",
@@ -126,18 +127,20 @@
     ]
   },
   "ignorePatterns": [
-    "node_modules/",
-    "server/tests/fixtures"
+    "node_modules",
+    "packages/tests/fixtures",
+    "apps/**/dist",
+    "packages/**/dist",
+    "server/dist",
+    "packages/types-generator/tests",
+    "*.js",
+    "/client",
+    "/dist"
   ],
   "parserOptions": {
-    "EXPERIMENTAL_useSourceOfProjectReferenceRedirect": true,
     "project": [
-      "./tsconfig.json",
-      "./shared/tsconfig.json",
-      "./scripts/tsconfig.json",
-      "./server/tsconfig.json",
-      "./server/tools/tsconfig.json",
-      "./packages/peertube-runner/tsconfig.json"
-    ]
+      "./tsconfig.eslint.json"
+    ],
+    "EXPERIMENTAL_useSourceOfProjectReferenceRedirect": true
   }
 }