Add SQLable API to development

[cyrilbois]

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Summary by cubic

Added SQLable (CSV to JSONL conversion) to the Development APIs list in README. Includes correct auth (none), HTTPS, and CORS flags.

^{Written for commit 7b130e4. Summary will update automatically on new commits.}

[github-actions]

API link: https://sqlable.com/csv-to-jsonl/

[cubic-dev-ai]

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