Enhance site professionalism and establish project governance documentation

[yoursanonymous]

Description

To maintain CNCF project standards and provide a professional first impression, the Volcano website requires an update to its core messaging, configuration cleanup, and the establishment of formal governance documentation.

Current Gap

• Inconsistent Messaging: The English homepage hero describes the project as "Edge computing," which contradicts the project's documentation and the Chinese version ("Batch container computing").
• Missing Governance: The repository lacks standard SECURITY.md and CONTRIBUTING.md files at the root, making it harder for new users to contribute safely and effectively.
• Branding Quality: Site configuration (params.toml) contains generic developer placeholders (e.g., test emails, Stanford University address) and unfinished widgets that detract from the project's authority.