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, 5 insertions, 4 deletions

diff --git a/ext/web/benches/encoding.rs b/ext/web/benches/encoding.rs
index 254ea4455..f8ad57c4f 100644
--- a/ext/web/benches/encoding.rs
+++ b/ext/web/benches/encoding.rs
@@ -29,11 +29,12 @@ fn setup() -> Vec<Extension> {
     deno_console::init(),
     deno_web::init::<Permissions>(BlobStore::default(), None),
     Extension::builder("bench_setup")
-      .js(vec![(
-        "setup",
+      .esm(vec![(
+        "internal:setup",
         r#"
-        const { TextDecoder } = globalThis.__bootstrap.encoding;
-        const hello12k = Deno.core.encode("hello world\n".repeat(1e3));
+        import { TextDecoder } from "internal:ext/web/08_text_encoding.js";
+        globalThis.TextDecoder = TextDecoder;
+        globalThis.hello12k = Deno.core.encode("hello world\n".repeat(1e3));
         "#,
       )])
       .state(|state| {