Agent Runtime v0.3.4

Agent Runtime v0.3.4 fixes the Simplified Chinese homepage and aligns both localized index pages with the home landing layout.

Highlights

• Converts localized index pages into proper layout: home landing pages.
• Adds clearer hero actions for the specification, quickstart, standards ecosystem, and LLM context.
• Keeps the homepage concise while routing detailed concepts to dedicated documentation pages.
• Fixes the GitHub Pages logo path so repository-base deployments load the site logo correctly.
• Keeps the core Agent Runtime specification compatible with v0.3.3.