docs: simplify MCP configuration with shared Dosu UUID

[castrojo]

Summary

• Make Goose the default tab in all MCP configuration sections
• Add shared Bluefin documentation deployment UUID for easier setup
• Simplify Dosu configuration - no API key required for read-only access
• Reorganize troubleshooting page structure for better flow

Changes

Configuration Simplification

• Users can now copy-paste the shared Bluefin docs UUID: 018da525-51f8-75ec-befc-c36a5f27ce5c
• No need to sign up for Dosu or generate API keys for basic usage
• Removed complex 4-step credential setup process
• Added clear note that shared UUID works for all Bluefin users

UX Improvements

• Goose is now the default tab (most Bluefin users will use Goose)
• OpenCode configuration moved to secondary tab position
• Consistent tab ordering across all configuration sections

Content Reorganization

• Moved MCP server descriptions to top of configuration section
• Grouped related configuration steps together
• Updated all code examples to use shared UUID

Testing

• ✅ Validated with npm run prettier
• ✅ Build succeeds with npm run build
• ✅ Manually tested in dev server at http://localhost:3000/docs/troubleshooting
• ✅ All tabs function correctly
• ✅ Code blocks render properly in both Goose and OpenCode sections

Related

• Addresses user feedback about complex MCP setup
• Aligns with Ask Bluefin initiative
• Improves onboarding experience for new users