Add LOOP-22 website growth and simplification overhaul

[dbarrante]

What changed

• Added LOOP-22, a runnable branch-mutating website growth and simplification overhaul covering crawl/render/index health, technical SEO, entity and claim truth, content usefulness, generative retrieval, information architecture, accessibility, performance, reliability, and conversion journeys.
• Added an explicit simplification ledger, evidence hierarchy, anti-hype rails, reversible mutation teeth, quantitative exit criteria, approval gates, and post-deployment measurement contract.
• Updated the README catalog and cadence to include LOOP-22.
• Updated LOOP-20 so plain-language website SEO/GEO overhaul goals can route to LOOP-22.

Why

The catalog did not have a single end-to-end loop for simplifying and improving a public website as a growth system. The supplied source material used the already-occupied LOOP-04 identifier and included several fast-moving GEO assumptions as universal rules. This PR assigns the next free identifier and keeps useful coverage while requiring current primary evidence and reproducible measurement.

In particular, llms.txt is optional and consumer-specific, structured data must match visible facts, research findings are not treated as ranking APIs, and traffic/ranking/citation improvements cannot be claimed before a real post-deployment observation window.

Impact

Operators can now run one bounded loop for a website overhaul while preserving the existing specialized frontend, UX, testing, CI, and adversarial-review guarantees. LOOP-20 can discover and dispatch the new capability from a plain-language goal.

Validation

• Confirmed 22 loop files and 22 unique loop-id values.
• Confirmed LOOP-22 includes every required PROTOCOL template section.
• Confirmed balanced fenced blocks and valid internal catalog file targets.
• Ran git diff --check with no errors.
• No runtime test suite applies; this repository is Markdown-only.