Create STATE.scm project documentation file (#2)

Introduces comprehensive project state documentation following the
state.scm specification (Guile Scheme S-expressions). Includes:

- Current position: v0.1.0-dev with foundation complete
- Route to MVP v1.0: 6 milestones (integration, containers, security,
WordPress production, observability, documentation)
- Issues catalog: 7 tracked issues (eBPF toolchain, testing, proxy)
- Questions for maintainer: 15 architectural/scope decisions needed
- Long-term roadmap: v1.0 through v3.0 (MVP to Platform)
- Critical next actions: 7 immediate priorities

This enables Claude Code sessions to resume from this checkpoint with
full project context preserved.

Co-authored-by: Claude <noreply@anthropic.com>

Author: hyperpolymath