src: put bootstrappers in lib/internal/bootstrap/

Create `lib/internal/bootstrap/` and put bootstrappers there:

Before:

```
lib/internal
├── ...
├── bootstrap_loaders.js
└── bootstrap_node.js
```

After:

```
lib/internal
├── ...
└── bootstrap
    ├── loaders.js
    └── node.js
```

PR-URL: https://github.com/nodejs/node/pull/19177
Refs: https://github.com/nodejs/node/pull/19112
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/node_url.cc b/src/node_url.cc
index cac2831af6e..6b56628d753 100644
--- a/src/node_url.cc
+++ b/src/node_url.cc
@@ -2275,7 +2275,7 @@ const Local<Value> URL::ToObject(Environment* env) const {
     // The SetURLConstructor method must have been called already to
     // set the constructor function used below. SetURLConstructor is
     // called automatically when the internal/url.js module is loaded
-    // during the internal/bootstrap_node.js processing.
+    // during the internal/bootstrap/node.js processing.
     ret = env->url_constructor_function()
         ->Call(env->context(), undef, arraysize(argv), argv);
   }