Refresh Cloud plans, availability and benchmark guide

[rmcdaniel]

Closes #123.

Updates the existing Cloud guide with all five available plans, pricing and allocations; single-region and multi-region HA boundaries; SLA measurement and credits; payment/provisioning and direct runtime connectivity; and the approved standard-workflow comparison table. Keeps Cloud Dev at 1 vCPU / 1 GB, $20 monthly cap and 0.25 standard workflows/sec. Explains the 30-day workflow-action estimate without making it a billing quota or universal capacity guarantee. Adds pricing/contact links and preserves the existing Dev measurement anchor.

Documentation-only change. Build, generated LLM content, focused page checks and publication verification are in progress.

[rmcdaniel]

Validation complete at ca19dc1: Node 24 production build passed, including route/link validation and regenerated canonical/2.0 LLM documents. All four PR checks passed. Focused Playwright checks at 1440 px and 390 px passed with no page errors or document overflow; wide tables remain independently scrollable. All five plan names, prices, benchmark comparison, and the existing #cloud-dev-capacity anchor are present. No separate Cloud benchmarks URL was added. Reviewed the complete one-file diff against the published pricing and customer-facing plan contract. Publication verification follows merge.

[rmcdaniel]

Published and verified live. Deployment passed for merged commit a32b396. The Cloud guide and both generated LLM bundles return HTTP 200 with the five-plan pricing, SLA, billing, and standard-workflow benchmark sections. Pricing and contact links also return HTTP 200. Local production build, desktop/mobile layout checks, and all PR checks passed. Issue #123 is closed.