chore: fix logger export to make it mockable.

[taeold]

Due to quirks of how tsdown generates JS code vs how tsc generates JS code, we tweak how logger module is exported to allow it to be mockable.

[gemini-code-assist]

Summary of Changes

Hello @taeold, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request refactors the logger module's export strategy to enhance its testability. By consolidating logging functions into a dedicated logger object and adjusting its re-export in the main v2 entry point, the changes resolve compilation quirks between tsdown and tsc, making the logger easily mockable for unit testing.

Highlights

• Logger Mockability: The logger module's export mechanism has been refactored to explicitly export a logger object containing all logging methods. This change directly addresses issues with mocking the logger for testing, particularly when dealing with differences in tsdown and tsc compilation.
• Export Refactoring: The src/v2/index.ts file now directly re-exports the logger object from ../logger instead of importing and then exporting the entire module. This ensures the newly created mockable logger object is correctly exposed at the top level.

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[gemini-code-assist]

Code Review

This pull request refactors the logger export to make it mockable for testing. It achieves this by introducing a logger object in src/logger/index.ts that bundles all logging functions, and then re-exporting this object from the v2 entrypoint. The changes are correct, well-contained, and align with the stated goal in the pull request description. This is a good improvement for testability.