Add Work IQ extension to community catalog (#2415)

* Add Work IQ extension to community catalog

Adds the Work IQ extension by sakitA to the community catalog.
Work IQ integrates Microsoft 365 organizational knowledge (emails,
meetings, documents, Teams) into spec-driven development workflows.

- 4 commands: ask, context, stakeholders, enrich
- 2 hooks: before_specify, after_specify
- Requires: speckit >=0.1.0, Node.js >=18.0.0, workiq CLI

Repository: https://github.com/sakitA/spec-kit-workiq

* Address PR review comments

- Fix download_url to use .zip (Spec Kit installer requires ZIP format)
- Bump top-level catalog updated_at to 2026-04-29

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

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Co-authored-by: Sakit Atakishiyev <satakishiyev@microsoft.com>
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>