feat(bundling): support rollup nested export

[Coly010]

Current Behavior

nested additionalEntryPoints are all moved to the root or the library

Expected Behavior

additionalEntryPoints path should be kept when bundling a library

Related Issue(s)

Fixes #33789

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☁️ Nx Cloud last updated this comment at 2025-12-12 14:19:36 UTC

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✅ The fix from Nx Cloud was applied

These changes fix three test failures introduced by the nested export feature. We corrected a typo in type-definitions.ts (file.name → file.fileName), updated all test calls to include the new bundle parameter, and fixed the export path mapping to filter by file extension so ESM and CJS formats don't interfere with each other.

We had verified this fix by re-running rollup:test.

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This fix was applied by Colum Ferry

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