Create a detailed Roadmap and Milestones

[sfloess]

Summarize priorities, version goals, and long-term vision in one place.

[sfloess]

Fleet-recommended roadmap priorities (5-model consensus: Claude + Gemini 2.5 Flash + Cohere Command-R+ + Groq Llama 3.3 70B):

Phase 1: Stability & Security (Immediate)

• Fix operator precedence bug in Socks5Server (done, 710d789)
• Wire USB/Wi-Fi transports into client TunnelService (done, 91d4f43)
• Fix IPv6 blackhole in VPN tunnel (done, 91d4f43)
• Expand test coverage for proxy layer (SOCKS5, DNS relay, UDP relay)

Phase 2: Reliability

• Graceful SOCKS5 server shutdown (shutdown() before shutdownNow())
• Connection resilience on Wi-Fi Direct group changes
• Watchdog improvements for transport recovery

Phase 3: User Experience

• Streamlined first-run setup flow
• Better error messages and diagnostics surfacing
• Performance metrics in UI

Phase 4: Community

• CONTRIBUTING.md and templates (done, 710d789)
• Detailed architecture documentation
• Good-first-issue labeling for contributor onboarding