perf: upgrade rslog and bundle into to main chunk

[Timeless0911]

Summary

Upgrade packages/core to rslog v2 and stop rewriting its runtime import to the prebundled CJS copy.

Bundle the rslog dependency into the main chunk to reduce require() calls, while still aliasing its prebundled types for declaration generation so consumers no longer depend on the old compiled runtime path.

Related Links

close: #1511

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

[Copilot]

Pull request overview

Upgrades packages/core to rslog v2 and changes the build setup so rslog is bundled into the core runtime output while only the prebundled rslog types are used during declaration generation.

Changes:

• Bump rslog dependency to ^2.0.1.
• Stop path/externals rewriting to the prebundled CJS runtime; bundle rslog in core output instead.
• Keep using prebundled rslog types for DTS generation via rslib aliasing and prebundle dtsOnly.

Reviewed changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated 2 comments.

File	Description
packages/core/tsconfig.json	Removes TS path mapping that previously redirected rslog imports to the prebundled copy.
packages/core/rslib.config.ts	Adds DTS alias for rslog types and stops externalizing rslog runtime.
packages/core/prebundle.config.mjs	Switches rslog prebundle to dtsOnly and removes CJS copy step.
packages/core/package.json	Upgrades rslog to v2.

Files not reviewed (1)

• pnpm-lock.yaml: Language not supported