Lead with three user benefits across all locales - #14

Summary

• Generate home metadata and introduction benefits from the canonical product story, with Japanese, Chinese, and Korean translations keyed by stable benefit IDs.
• Keep the H1 as Stack only, with a separate tagline, supporting description, and a focused first-diagram CTA.
• Clarify CLI/browser entry paths and next steps for coding agents, runtime examples, provider packs, configuration, and references.
• Preserve all existing page URLs, installer commands, immutable machine resources, and runtime-only example rendering.

Validation

• 22 tests passed, including source-to-home propagation, locale parity, and missing-copy guards.
• Deterministic generation/check and whitespace checks passed.
• All four documented CLI walkthroughs passed against published CLI 0.5.1.
• Website rendering of the supporting hero description and consumer pin update follow after this provider change merges.