docs: improve introduction page

[0xallam]

Summary

• Expand intro with use cases, security tools, multi-agent architecture
• Add quick example code snippet
• Add community section
• Standardize Discord links to discord.gg/strix-ai

[greptile-apps]

Greptile Summary

Expanded the introduction page with new sections on use cases, security tools, and multi-agent architecture, added a quick example code snippet, included a community section, and standardized all Discord links to use the vanity URL format discord.gg/strix-ai across all documentation files.

Key Changes:

• Added Use Cases section highlighting application security testing, penetration testing, bug bounty automation, and CI/CD integration
• Added Security Tools table documenting HTTP Proxy, Browser Automation, Terminal, Python Runtime, Reconnaissance, and Code Analysis capabilities
• Added Multi-Agent Architecture section explaining distributed workflows and dynamic coordination
• Added Quick Example with installation and basic usage commands
• Added Community section with Discord and GitHub cards
• Added "Infrastructure" row to Vulnerability Coverage table
• Standardized Discord invite links from discord.gg/YjKFvEZSdZ to discord.gg/strix-ai in 3 locations

Confidence Score: 5/5

• This PR is safe to merge with no issues
• Documentation-only changes that enhance clarity and user experience. All additions are well-structured, consistent with existing documentation style, and properly formatted. Discord links were correctly standardized across all files. Code examples use consistent environment variables matching the rest of the codebase.
• No files require special attention

Important Files Changed

Filename	Overview
docs/index.mdx	Enhanced introduction page with use cases, security tools table, multi-agent architecture, quick example, and community section
docs/contributing.mdx	Standardized Discord link to use vanity URL format
docs/docs.json	Updated Discord links in navigation anchors and footer socials to use vanity URL