build(deps): bump esbuild and unbuild

Bumps [esbuild](https://github.com/evanw/esbuild) to 0.25.9 and updates ancestor dependency [unbuild](https://github.com/unjs/unbuild). These dependencies need to be updated together.


Updates `esbuild` from 0.21.5 to 0.25.9
- [Release notes](https://github.com/evanw/esbuild/releases)
- [Changelog](https://github.com/evanw/esbuild/blob/main/CHANGELOG-2024.md)
- [Commits](evanw/esbuild@v0.21.5...v0.25.9)

Updates `unbuild` from 2.0.0 to 3.6.1
- [Release notes](https://github.com/unjs/unbuild/releases)
- [Changelog](https://github.com/unjs/unbuild/blob/main/CHANGELOG.md)
- [Commits](unjs/unbuild@v2.0.0...v3.6.1)

---
updated-dependencies:
- dependency-name: esbuild
  dependency-version: 0.25.9
  dependency-type: indirect
- dependency-name: unbuild
  dependency-version: 3.6.1
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]