refactor: Use ES modules for internal runtime code (#17648)

This PR refactors all internal js files (except core) to be written as
ES modules.
`__bootstrap`has been mostly replaced with static imports in form in
`internal:[path to file from repo root]`.
To specify if files are ESM, an `esm` method has been added to
`Extension`, similar to the `js` method.
A new ModuleLoader called `InternalModuleLoader` has been added to
enable the loading of internal specifiers, which is used in all
situations except when a snapshot is only loaded, and not a new one is
created from it.

---------

Co-authored-by: Bartek Iwańczuk <biwanczuk@gmail.com>

1 files changed, 23 insertions, 28 deletions

diff --git a/runtime/js/01_build.js b/runtime/js/01_build.js
index 778331cdd..a9515c5b8 100644
--- a/runtime/js/01_build.js
+++ b/runtime/js/01_build.js
@@ -1,33 +1,28 @@
 // Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
-"use strict";
 
-((window) => {
-  const { ObjectFreeze, StringPrototypeSplit } = window.__bootstrap.primordials;
+const primordials = globalThis.__bootstrap.primordials;
+const { ObjectFreeze, StringPrototypeSplit } = primordials;
 
-  const build = {
-    target: "unknown",
-    arch: "unknown",
-    os: "unknown",
-    vendor: "unknown",
-    env: undefined,
-  };
+const build = {
+  target: "unknown",
+  arch: "unknown",
+  os: "unknown",
+  vendor: "unknown",
+  env: undefined,
+};
 
-  function setBuildInfo(target) {
-    const { 0: arch, 1: vendor, 2: os, 3: env } = StringPrototypeSplit(
-      target,
-      "-",
-      4,
-    );
-    build.target = target;
-    build.arch = arch;
-    build.vendor = vendor;
-    build.os = os;
-    build.env = env;
-    ObjectFreeze(build);
-  }
+function setBuildInfo(target) {
+  const { 0: arch, 1: vendor, 2: os, 3: env } = StringPrototypeSplit(
+    target,
+    "-",
+    4,
+  );
+  build.target = target;
+  build.arch = arch;
+  build.vendor = vendor;
+  build.os = os;
+  build.env = env;
+  ObjectFreeze(build);
+}
 
-  window.__bootstrap.build = {
-    build,
-    setBuildInfo,
-  };
-})(this);
+export { build, setBuildInfo };