Add data-table export path and bump version to 0.17.1

- Create src/index.ts main entry point
- Add src/data-table/index.ts with consolidated data table exports
- Update package.json exports to include ./data-table path
- Update vite.config.ts to build data-table entry
- Bump version from 0.17.0 to 0.17.1

This enables clean imports like:
import { DataTableFilter, useDataTableFilters, createColumnConfigHelper } from '@lambdacurry/forms/data-table'

Requested by: Jake Ruesink

Author: codegen-sh[bot]