Task: Improve cybernetics documentation

Deliver three bundled documentation improvements to the cybernetics meta-layer:

1. Create a standalone cybernetics summary page (doc/meta/cybernetics.org) that explains what cybernetics is and replaces bare Wikipedia links currently used across the repo.
2. Expand Cybernetic Levels (doc/meta/cybernetic_levels.org) with a section on how ORE Studio's approach connects to and diverges from Beer's VSM, including known limitations.
3. Create a new Viable System Model knowledge page (doc/meta/viable_system_model.org) introducing Beer's five systems and linking to Cybernetic Levels.

• [ ] doc/meta/cybernetics.org created as a v2 knowledge doc; covers what cybernetics is, key ideas (feedback, regulation, variety), Stafford Beer's contribution, and how it informs ORE Studio.
• [ ] doc/meta/viable_system_model.org created as a v2 knowledge doc; introduces the five VSM systems and the 3* audit channel; links to Cybernetic Levels.
• [ ] doc/meta/cybernetic_levels.org expanded: new section on where ORE Studio's mapping aligns with and departs from canonical VSM, including known limitations.
• [ ] Existing Wikipedia cybernetics links replaced with in-repo id-links.
• [ ] doc/meta/meta.org index updated to list both new pages.

(Transient implementation strategy. Written when work starts; distilled into the parent story's * Decisions and cleared when the task closes. Plans do not outlive their task.)