fix(router-plugin): make codeSplittingOptions.splitBehavior work with verboseFileRoutes

[SeanCassiere]

When verboseFileRoutes was set to false, the codeSplittingOptions.splitBehavior option wouldn't work because:

• The routeId wouldn't be read of the source route file since it behaviour of verboseFileRoutes didn't print it.
• The codeSplitGroupings wouldn't be read from the source file since shape of createFileRoute would be drastically different between verboseFileRoutes: true vs verboseFileRoutes: false.

This change, makes it so that this info which is already available in the generator, is passed down to the router-plugin and in-turn fixes original issue.

[nx-cloud]

View your CI Pipeline Execution ↗ for commit 05bcff5.

Command	Status	Duration	Result
nx affected --targets=test:eslint,test:unit,tes...	✅ Succeeded	1m 31s	View ↗
nx run-many --target=build --exclude=examples/*...	✅ Succeeded	5s	View ↗

---

☁️ Nx Cloud last updated this comment at 2025-06-13 09:56:43 UTC

[pkg-pr-new]

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commit: 05bcff5