fix(ext/node): return real OS file descriptors from node:fs APIs

Author: fraidev

ext/node/lib.rs

@@ -212,6 +212,7 @@ deno_core::extension!(deno_node,
     ops::fs::op_node_statfs_sync,
     ops::fs::op_node_statfs,
     ops::fs::op_node_file_from_fd,
+    ops::fs::op_node_dup_fd,
     ops::fs::op_node_cp_check_paths_recursive,
     ops::fs::op_node_cp_on_file,
     ops::fs::op_node_cp_on_link,
@@ -470,6 +471,7 @@ deno_core::extension!(deno_node,
     "internal/fs/streams.mjs",
     "internal/fs/utils.mjs",
     "internal/fs/handle.ts",
+    "internal/fs/fd_map.ts",
     "internal/hide_stack_frames.ts",
     "internal/http.ts",
     "internal/http2/util.ts",