Summary

This pull request modernizes the Elasticsearch adapter by aligning TypeScript configuration and improving type exports.

It includes:

🔧 Configuration cleanup
• Removed the "type" field from package.json to avoid forcing ESM.
• Adjusted TypeScript compilation settings (target and module) for better compatibility with current build targets.
• Removed moduleResolution from tsconfig, allowing the project to inherit standard resolution defaults.

📦 Type improvements
• Removed redundant re-exports of Elasticsearch types, reducing duplication and potential confusion.
• Added explicit Elasticsearch type definitions to src/types.ts to provide stronger typing for consumers.
• Exported additional helper types from src/types.ts to improve the DX for TypeScript users.

These changes are non-breaking for existing JavaScript/TypeScript users and improve overall type safety and compatibility with modern TypeScript setups.

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✅ Motivation

The goals of this PR are to:
• Align the adapter with more predictable TypeScript configuration defaults.
• Make Elasticsearch types more explicit and easier to consume.
• Reduce unnecessary re-exports that add maintenance burden.

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🧪 Tests & Documentation

If no tests or documentation updates are included, you can add a note here (optional), e.g. “No functional changes were made so tests were not added or modified.”

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📌 Notes for Maintainers
• This PR only affects developer/consumer build/typing experience; runtime behavior is unchanged.
• If you’d prefer these changes split into smaller reviewable commits, I can rebase accordingly.

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