close #7281

Summary

Multi UserDefined entry chunks point to the same entry module; Rolldown treats one of them as the facade entry. #7281, entry2.js is treated as the facade entry, and the import ./xxx statement—which is required for a facade entry—has been added.

// entry.js
export * from "node:fs"

// entry2.js
import "./entry.js";

export * from "node:fs"

However,no import statement is required.

I have therefore added the following checks:

1. Collect the facade entry and entry corresponding to the same entry module
2. All content within the entry module must be in the form of re-exports.
3. At least one of the source clauses in a re-export statement must be an external module;
4. Indirect re-exports check whether the final module is an external module.