fix(typescript-sdk): add subpath export for v1 to support ESM imports

[dhimanAbhi]

Description

Fixes ESM import error when using: import { HatchetClient } from '@hatchet-dev/typescript-sdk/v1';

In native Node.js ESM environments, this import currently throws: ERR_UNSUPPORTED_DIR_IMPORT

This happens because Node.js ESM does not support directory imports without explicit subpath exports. This PR adds a proper subpath export for ./v1, mapping it to dist/v1/index.js, allowing the documented import path to work correctly in ESM.

Fixes #3613

Type of change

• Bug fix (non-breaking change which fixes an issue)

What's Changed

• Added subpath export for ./v1 in package.json
• Ensured compatibility with both ESM (import) and CommonJS (require)
• Verified fix using a minimal ESM reproduction setup

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