docs: update warpgate template README for ares project and new agent structure

[l50]

Key Changes:

• Refactored README to represent Ares as the primary project, replacing Dreadnode and legacy template descriptions
• Updated template listings, descriptions, and architecture/platform support for all agents and components
• Modernized usage, build, and run instructions for new CLI, agent, and GPU templates
• Revised documentation, support, and project references to point to Ares and current repositories

Changed:

• Project branding and focus - README title, intro, and overview updated to center on Ares instead of Dreadnode, clarifying the purpose as building Ares red/blue team agents and AMIs
• Template listings and descriptions - All agent, orchestrator, and GPU image descriptions reworked to match the new Ares agent structure; tables updated for accuracy, platforms, and base images
• Build badges and CI references - Updated badge URLs and CI workflow links to point to the new ares repository and workflows
• Usage instructions - Build, validate, and run examples rewritten for new agent images, architectures, and CLI; included GITHUB_TOKEN and AWS credential requirements where needed
• Directory and template structure - Directory trees and example YAML updated to reflect new agent breakdown and provisioning process
• Documentation and support links - All project references, support, and contribution links updated to Ares, with outdated/legacy project and GOAD references removed or replaced

Removed:

• GOAD infrastructure and Ray cluster template sections - All documentation and tables for legacy GOAD Windows AMIs, Ray cluster, and CTF challenge templates removed to focus exclusively on Ares agent and GPU templates
• Template comparison table - Feature comparison matrix for legacy agents and base images eliminated in favor of concise template descriptions
• Outdated contributing, support, and related projects sections - Legacy contribution guides, support channels, and unrelated projects removed to streamline documentation and avoid confusion