v0.24.3 - fix broken types bundle

[stackoverfloweth]

Summary

• Republish to fix the broken types entry shipped in v0.24.2: dist/kitbag-router.d.ts went out as just export {}, so every named import (createRejection, createRouter, etc.) appeared as a missing export to consumers. The runtime .js bundle was fine — only the .d.ts entry was empty.
• Add a prepublishOnly script so npm publish always runs npm run build first, preventing a stale/partial dist from being published again.

Test plan

• After merge + publish, install @kitbag/router@0.24.3 in a fresh project and confirm import { createRejection } from '@kitbag/router' resolves
• Confirm dist/kitbag-router.d.ts in the published tarball contains export * from './src/main'

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