v0.4.0

Added

• OpenCode joins Claude Code and Codex as a first-class tool. Baked into the
  image and auto-updated on every aic rebuild, with persistent login,
  per-project transcripts, and the shared .env/curl|sh guardrail wired in as
  an OpenCode plugin. Host ~/.config/opencode/opencode.json provider/model
  definitions are seeded read-only (inline API keys stripped — log in inside with
  opencode auth login); it's on by default, or choose it with
  aic init --with …,opencode. (aic, template/)