feat(ext/node): embed std/node into the snapshot (#17724)

This commit moves "deno_std/node" in "ext/node" crate. The code is
transpiled and snapshotted during the build process.

During the first pass a minimal amount of work was done to create the
snapshot, a lot of code in "ext/node" depends on presence of "Deno"
global. This code will be gradually fixed in the follow up PRs to migrate
it to import relevant APIs from "internal:" modules.

Currently the code from snapshot is not used in any way, and all
Node/npm compatibility still uses code from 
"https://deno.land/std/node" (or from the location specified by 
"DENO_NODE_COMPAT_URL"). This will also be handled in a follow 
up PRs.

---------

Co-authored-by: crowlkats <crowlkats@toaxl.com>
Co-authored-by: Divy Srivastava <dj.srivastava23@gmail.com>
Co-authored-by: Yoshiya Hinosawa <stibium121@gmail.com>

ext/node/polyfills/buffer.ts

@@ -0,0 +1,13 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+// @deno-types="./internal/buffer.d.ts"
+export {
+  atob,
+  Blob,
+  btoa,
+  Buffer,
+  constants,
+  default,
+  kMaxLength,
+  kStringMaxLength,
+  SlowBuffer,
+} from "internal:deno_node/polyfills/internal/buffer.mjs";