* feat: typescript client esm build
* fix: add --dts flag and restore tsconfig options for typescript client ESM build
- Add --dts flag to tsdown commands to generate declaration files
- Restore outDir in tsconfig.json for compatibility
- Restore forceConsistentCasingInFileNames for case-sensitive systems
- Update README_DEV.md to reflect new tsdown build process
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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Co-authored-by: Ruben Fiszel <ruben@windmill.dev>
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>