Launch the Astro marketing site

[ORESoftware]

Summary

• launch the organization marketing site as Astro, with no Jekyll, Hugo, or React runtime
• add distinct Product, Trust, and About routes with shared responsive navigation and a full footer
• provide user, organization, and Shared Auth access paths
• deploy the built static artifact through pinned GitHub Pages actions

Validation

• generated source contract tests passed
• dependency lock generated with npm
• representative template build passed Astro check with zero diagnostics